Cush'n for
Push'n - the abbreviated and rhyming form of the phrase 'Cushion for pushing', which refers to any 'cushioning' around the genital area of a female, including pubic
hair and excess
fat, which may provide 'cushioning' when having intercourse.
John: Dude, did you bang that fat
chick you were with last night?
Bob: What? She wasn't
fat, she just had a little cush'n for push'n, y'know?