Green’s Dictionary of Slang

1. (gay) anus.

2001

Billy Bob ‘A Few Good Men 17’ on Nifty Erotic Stories Archive 🌐 Pushing my legs even further up, he brought my butthole into a position that he could easily drive into at an even greater angle. From there, he put an end to my dick dance and proceeded to deep dick me into fucking oblivion. After a couple minutes of slow and deep fucking, he sped up to fully enjoy the pleasures of my mangina.

2. (US campus) a reticent, reserved man.

2004

Eble Campus Sl. Apr. 4: mangina – male who is afraid or reserved.