I was digging through my old cassette tapes from the 80s and came across a Prince "New Mix" which had a top tune bolted at the end which I don't know and wondered if anyone could tell me the name. It's similar in style to "Cloreen Bacon Skin" - bass + drums with a strong 3-note synth horn motif with Prince singing in skat-style. It's got a line where he says "What Tricky say...Yakkity-Yak?! Yakkity-Yak my ass, motherfucker...Give me some horns!!". Very funky tune.

"Tricky"?

http://www.princevault.com/index.php/Tricky

It's a B-side by The Time with Prince imitating Morris Day's vocals (at least one aspect of them). So it's not a bootleg track, although of course quite rare.

Aaaah...that's the one. Thanks novabrkr.