-Did you see those two making out?
-Yeah, they were totally going under the hat.
by cc911 December 23, 2008
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A gay man who does want to admit that he is gay.

Slang for gay men who have have not come out yet when referring to each other in the park at night
Hey bro, you under the hat like me?

He was under the hat until his wife found out the truth
by Tetrault March 19, 2013
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Keep something a secret.

There are four origins of this idiom (I GUARANTEE IT):

- English archers protected their bows by putting the strings on their heads under their helmets;
- “keep it under our hat” was mentioned in 1982 in periodical "Gleanings in Bee Culture";
- President Abraham Lincoln's stove pipe hat, where he kept important papers;
- the ceremonial swordbearer of the Lord Mayor of London (can be dated to 1420), who keeps the key to the Lord Mayor’s seal of office in a special pocket in his hat.
-keep it under one's hat-

Joey: All right, what else?
Chandler: Well uh, there was acting classes, stage combat classes, tap classes…

Joey: Which we're still keeping under our hats!
by Kisa Boris July 13, 2016
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