under the table

similarly to coming out of the closet, being “under the table” is when your with your same sec partner and have to act straight in public

girlfriend 1: babe why are you so distant today?

girlfriend 2: shh, i’m under the table right now so i don’t get hate crimes

Under-Developed

Not fully developed as in a sense of body, mind and experience. Typically known as frigid.

I know you are an under-developed 18 year old.

under the bag

The aftermath of being stoned.

Sorry I was acting lethargic at the diner. I was half under the bag from ealier that day.

under tit

the underside of the breast. usually in large chested women

ouch you hit my under tit...
thats a cup i hit your under tit

under the act

when someone is acting different than usual or is lying

yo man you under the act

Down Under

People who live in Australia

That person is from down under

Under The Pump

When you masturbate then do a backflip as you climax so that you ejaculate on your own face in mid-air.

Person 1: "Is that a bit of ranch dressing on your face?"
Person 2: "Nah, I've just been under the pump"