VLSU

Vaginal Life-Support Unit. A wife or steady girlfriend who takes good care of you. VLSU is not necessarily intended to be derogatory, and can even be a compliment, but definitely does not describe the full skillset and value of a good woman.

Jason: Yo, Bobcat, your gf is really into you.
Bob: Yeah. She’s my VLSU.
Jason: I need to get me one of those!