1. The act of shoving or ramming something up someone's rectum, in a theoretical sense, in attempt to get even with someone or gain revenge.

2. The Latin Name for the plant Glossy Buckthorn, known for it's sharp and peircing thorns.
If homeboy don't stop skylarking around town he's going to feel my rhamnus cathartica.
by Powersc9 December 7, 2008
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