Simp

From Rap Dictionary

noun

simp

1. Derived from simpleton, used for rhyming with pimp. Short baby I ain't no simp, but the nigga in the suit ain't nothin' but a pimp -- Too $hort (Cocktales [??]).
2. Someone that gets played by women instead of being the player. The opposite of a pimp.

verb

simp

To sing and pimp, from Boyz II Men: Simpin' ain't easy.