1) when one feels the need to curse out his "cuzzin" in a jacuzzi.
2) when one "accidentally" macks on his cuzzin
1) "Auntie, Your nephew Brad just was just cuzzing me out," said Little Tom.
2) From Mean Girls. "You know who's lookin' fine tonight? Seth Mosakowski. Gretchen: He's your cousin! (to Gretchen, regarding Seth) Yeah, but he's my first cousin...see you got your cousins, then your first cousins...
IM TOTALLY FUCKING CUZZING!!!