Top definition
1. Having current sexual knowledge of a female. 2. Being aware of the existance of something (usually something positive). See also all up in that.
"You see Lisa last night?" "I'm up in that, G." "Word."
by Dr. Shatner June 06, 2004
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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