When someone is sucking someone's cock and their balls are repeatedly hitting someone's chin.
Sally was going so far down the other night, she was chinnin.
by FurnaceATL May 5, 2010
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An alternative for "buzzing", i.e. being really happy or content with something. Except typically used when drunk and outside a club or bar in the smoking area.
Chinnin' mate. That's ideal.

I'm proper chinnin' lads, let's raid some wombs.
by Haider the womb raider May 20, 2021
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