Someone displaying unusually high homosexual tendancies. Usually aimed at straight men to disparage sexuality.
Word originates from East Midlands, UK local slang.
-Lee is such a turbomincer dude I cant believe he has that beard.
-Ya I know what a massive turbomincer dude.
Used to describe someone who is so irritable that they give you the same creeps as a nonce. Their constant ability to be irritable in all situations amplifies the issue, hence the addition of turbo.