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1) To ask someone in a nonchalant manner if they have some shit(meth) for sale.(verb)(twack-a-lacking)
2) To ask someone if they have tweaked on something.(verb)(twack-a-lacked)
3) Refering to the state of mind after consuming a substantial amount of high quality METH.(adj)(twack-a-lackin')

1)"Oy ya fuckin tweaka are you twack-a-lackin'?"

2)"What in the hell have you twack-a-lacked on now?"

3)"Damn daw' ya pupils are fuckin huge! Are you twack-a-lackin?"
by P.T Kt Bec October 15, 2006
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