Word(s) that only ever appeared in one (hit) song, ever.

Flux-capacitor - that song by Busted.

pesos, waffle-house, damning, boy-shorts, doubling
- R Kelly feat Usher 'Same Girl'

dresser, spatula, unheard, sniggles, midget,
- R Kelly 'Trapped in the Closet'

"EINS-ZWEI-DREI-VIER!!!"

(ahem)

Delaware, Perry Como

Inspired by a recent listen to Thriller:

"the doggone girl is mine"

^^^ "Glad All Over" by the Beatles

Ah, forgot about that one. And theres probably 846 different country songs I haven't heard that use "doggone".

"Glad all over" is either "by the Dave Clark Five" or "recorded for a radio 1 session", so either way wasn't a hit.

"Doggone" also appears in Marvin Gaye's "I'll Be Doggone."

"Midget" also appears in Sly & the Family Stone's "Stand."

How about "fruitless"? (Peter Gabriel, "In Your Eyes")

the word "agrophile" appears in Alice Cooper's "Dead Babies"...perhaps not a big "hit", but we all know the song...so there...

and just what the hell is an "agrophile"?

"Snakes On A Plane" = that Kanye song where he says "Snakes On A Plane"

I'm guessing "You're So Vain" is the only hit song to reference Nova Scotia...and Saratoga, for that matter...

Nova Scotia's also in Translator's "Everywhere I'm Not."

Was that a hit single?

I had thought it was, but now that I check, it wasn't. Still comes up on SF radio every once in a while, though.

It should've been, though.

http://youtube.com/watch?v=AQ9TfJjKHUM

"designated driver": Montell Jordan, "This is How We Do It"

"reaper"...you know the song...

It's not a pop hit (yet), but the use of "thus" in Rick Ross & T-Pain's "The Boss" must be very rare indeed, and possibly unique in its genre.

"hen fap" in Kanye West's "Gold Digger"

"academia" - Saint Etienne, He's On The Phone
"piscean" - The Sundays, Summertime

in terms of hip-hop (and perhaps more widely), "bakery" and "fakery" - Three 6 Mafia "Poppin' My Collar"

and although it was probably never used in any other context by anyone ever, so it shouldn't really count, "knockatize" in "Pigeons" by Genesis (if only because it's probably the best thing they did)

"Jacques Derrida" by Scritti Politti has some great words in it, like "Cashanova", "Rapacious", "Assuage" and last but not least "Bop sh'day-o" (according the lyric site I'm looking at), which also appears in "The sweetest girl", sort of.

How about grody, from Frank Zappa's "Valley Girl?"

If that's how you spell it....

"academia" - Saint Etienne, He's On The Phone

"Academia Blues" - Perfect Skin, Lloyd Cole

"shtick" - Barry White, "Never Never Gonna Give You Up"

"TVC15", not much of a word.

But it counts.

Re. Scritti: is "Wood Beez" the only hit to include the word "intravenous" (again I suspect there may be several dozen rap-related responses to that)?

Is it not in "Just like a pill" pink?

Good call.

http://www.spinaltapfan.com/atozed/images/intravsm.jpg

"symbolic" as featured during a verse of that earth's-core-shakingly massive hit tune "Mr. Jones", performed by Counting Crows.

"antediluvian" - Donovan, "Atlantis"

is "Wood Beez" the only hit to include the word "intravenous"

Partial credit to Stars of 45 for beginning the titling of their Beatles medley "Intro: Venus ..."

er, Stars ON 45 ...

"Chromium steel" - "Allentown."

I'm guessing "You're So Vain" is the only hit song to reference Nova Scotia...and Saratoga, for that matter...

"Gavotte"

Santeria by Sublime.

Gavotte was mentioned earlier.

"reaper"...you know the song...

Prince used "reaper" in Let's Go Crazy.

"EINS-ZWEI-DREI-VIER!!!"

Not exactly it, but "Der Kommissar" opens with the line "Zwei drei vier, one two three, it's easy to see..."

And though technically not part of the lyrics, Kraftwerk do count in "Eins-Zwei-Drei-Vier" on "Showroom dummies".

"reaper"...you know the song...

Prince used "reaper" in Let's Go Crazy.

OK, same song: "redefine"

When you said "you know the song", my first thought was Don't Fear The Reaper by Blue Oyster Cult. Sorry.

"funky cold medina"

xpost: that was the song I had in mind...(good catch re: Prince)...

The B-52s had a bunch of these:

"Give Me Back My Man" - "Korvettes"
"Dance This Mess Around" - "limburger"
"Rock Lobster" - "earlobe," "lobster," "noseguard," "tanning butter," "stingray," a bunch of other crustaceans
"Quiche Lorraine" - "appliques"

"Being For the Benefit of Mr. Kite!" - "somersets"

I'm guessing "You're So Vain" is the only hit song to reference Nova Scotia

Well, you'd be wrong then, since the Proclaimers' Letter From America contains the line "the day you sailed from Wester Ross to Nova Scotia".

"Whore"

in "You little thief" Feargal Sharkey...