Verb-When a girlfriend, wife, or spouse is mad at their boyfriend, husband, etc. She begins to give him oral sex and stroke his testicles, before the man ejaculates, the women headbutts the man in the penis, more specifically the shaft and then punches the man in the testicles. Hince the name, the banana nutt crunch.
Man, did you hear what Shaquita did to Gonzo? He pissed her off so much, she tricked him into taking his pants off and she gave him a banana nutt crunch, and i ain't talkin' about the cereal.