Irish slang for having sex
"I will buck a French lad, Erin. I will buck a French lad, so help me God"
Derry Girls, Series 1: Episode 2
When people try to start stuff with you, and try to get up all in your face.
Yo, Becky try to buck at me earlier.
An African or slave, especially an African slave.
The buck breaking fields of Dixie!