Bad Coconut.

The smell of a girl returning home to her man after having sex with someone else, but using douche or vinegar to cover the stench.

Boyfriend: Hey bitch, where you been? What's that smell?
Girlfriend: Oh it's my new deodorant.
Boyfriend : Bitch stop lying, that ain't no Lady Speedstick. You been fucking on your period. Smelling like a bad coconut.