Going balls deep in your sister, cousins, brother (or other kin) etc.
John: Man I kinsbaned my sister last night. Balls deep son, nice and wet
Broham: No way!
John: Yep, moms next.
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug