Top definition
to have sex or get really comfortable with another person... usually of the opposite sex...
Koby wasn't just shackin it up with monika but with every other girl out there except for me cuz i dumped him!!!!
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May 1 Word of the Day
When some little bitchboy is acting like a little tiny pee pee poo poo baby and messing up the group plans.
I’m tired I wanna go home

“Oh I didn’t know it was pee pee poo poo hours”
by A7sa July 03, 2019
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2
to get it goin on with another person... having sex...getting close and cuddly with each other
Monika and Koby was "shackin it up" with each other in the bed
by Koby's ex June 26, 2003
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