The act of being high on amphetamines. This includes jerky movements, picking, acting extreme, and tinkering with everything.
He is definitely going to flop tonight.
by Bacita Mae Jenkins January 16, 2018
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Drunk passed out on a subway station bench.
A sleeping lush, known as a "flop", attracts a hierarchy of scavengers. First come the top lush-workers, the only want cash, good rings and watches. Then come punks who will steal anything, they take the hat, shoes, belt. Finally, brazen, clumsy thieves will try to pull the lush's overcoat or jacket off him.
by brasswater July 9, 2013
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Equates to 'beaten', weighed or murked. If somebody is 'flopped', they are beaten up. Used by rudeboys and chavs in south Essex.
"What you lookin' at blud? Man'z gonna be flopped!"

by Essexdan February 16, 2007
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flip flops or as old people call them, thongs
Lauren-Check out these sweet flops!
Susie-Oh! Are they havhavianas?
by Reprah January 12, 2009
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When someone decides not to show up last minute.
I can't believed he flopped. I waited at the McDonals for an hour!
by DJ Flipside August 15, 2007
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(v) To fail at a test.
Oh man, I hate exams, I totally flopped that one.
by seasonticket August 18, 2006
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