The master of the vag (pronounced vadge, aka, vagina).
Typically female, the vagmaster controls all entry into and actions within the vag. In rare cases, a pimp may assume control of entry into the vag area, becoming a monetary vagmaster, for a nominal fee to the biological vagmaster. Both parties benefit from monetary gain.
"So have you gotten laid yet?"
"No way man, she's one prude-ass vagmaster."