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A general gumby, a real doofus, one who has just displayed extremely limited talent at a task. Generally only used directed at the gumby/doofus immediately after such display. Origins from Australia.
'Oh dear, it appears I have poured piping hot gravy all over myself.'
'Way to go, you shmacky.'

'Oh man, I just found out my girlfriend was a man.'
'Nice one, shmacky.'
by Matt August 25, 2004
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May 2 Word of the Day
when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life
Dan: bro why have you been staring into space for the last hour doing nothing?
Me: bro i have a chronic cringe from what happened earlier I can't concentrate
by finesseeeee March 01, 2019
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2
A British slang term made up by two cousins one day used to describe a very promiscuous man (see manwhore)
Girl 1: "That guy has at least four girlfriends."

Girl 2: "Yeah, he's such a shmacky."
by cachick August 10, 2010
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