the act of having anonymous sexual encounters with other men in public toilets.
A contraction of the words 'black' and 'hench
'. I'm sorry if you lads didnt know it was a racial thing but it is. It's never used in a negative light though.
"Seen that bouncer man? He's blench an he's got a cute lil beard."
© 1999-2015 Urban Dictionary ®
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