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Someone who is slacking off, being lazy, or just being plain stupid
Lj and Sean were caught shlacking by chica when he found them tryna pipe Glendale freshmen
by L and the J's September 01, 2017
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a huge smack to a certain object.
Dude I gave your mom's ass a good shlacking last night.
by mattyc April 04, 2003
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