And it ain't gon' cost me because she my caddy
Cuz she grabbed my golf balls in the club

from Kanye West (Ft. Ludacris) – Breathe In Breathe Out Lyrics on Rap Genius

Meaning

Word play. A caddy can mean:
– a low-paying job (so it’s not going to cost Kanye anything, contrary to her previous man)
– the person who carries a golf player’s bag and clubs, which ties in with the next line, where balls = golf balls/testicles and club = golf club/nightclub

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