find out! 

phrase used to insult students at Clarke School in Northampton 1989-1991 to imply improper sexual behavior

a student walks in on another student and a teacher
M: Oh my god! You and Ms. Phelps? Find Out!

or

M: What took you so long in the bathroom?
L: I had to wash my hands...
M: Ugh! Find Out!

find out! by GBOF September 29, 2003

find out! 

a polite/tease way of telling one that you KNOW something is up.

M walks in the lounge and see that K and L are chatting on the couch.
M: oh my god! you two? find out!

find out! by m. October 1, 2003

find out

discovering, learning about something, a catch-all exclamation of approval (usually dance related). origin: dressing room 15 at the David H. Koch Theater

"I'm going to Stars and Stripes rehearsal,"
Max: "Find out"
"Did you see Katie's Dewdrop, she found out!"

find out by Dressing Room #15 January 20, 2009

find out

A person who denies that they are gay, but later finds out they are.

"Dude, that burberry wearing freak is such a find out."

find out by ashisme February 3, 2008

find out

The second phase of "fuck around and find out," basically, the consequences of what happened when you fucked around.

After having spent several billion on Tumblr, Verizon quickly realized they entered the 'find out' phase of fucking around, and couldn't profit off the adult content on the site.

find out by Somebody, but not Nobody May 12, 2023

Find out if I'm the Host 

To commit suicide. Reference comes from online video games, where a player quits the game when they are tired of playing or disillusioned with their suckage.

In these games, such as Call of Duty (pre modern warfare 2), one of the players in the game is randomly and unknowingly given the host connection. If this player leaves the game, it ends the match for everyone :(

When a player is fed up and tired of getting owned, they may decide to leave the game. When doing so, one might exclaim they are going to "find out if they are the host", referring to the possible outcome when they leave the game and as a result the game ends for all the players.

The term refers to committing suicide, as in similar frustration when leaving a video game.

(In game) " Wow, i have died 36 times in a row and I can't get a kill. The enemy team is just a bunch of camping snipers. This connection sucks ass, i'm lagging all over the place. Im about the find out if im the host"

(real life application)

"Yo bro, I just got a 15 on that math test, I'm about to find out if I'm the Host"

"Wow some kid just walked over to me and said 'safety', i'm about to find out if i'm the Host"

"My best friend has been secretly sleeping with my girlfriend for 3 months now. Im about to find out if Im the Host"

Find out if I'm the Host by 36enuf November 22, 2009

Find out what? 

A way of saying you might be able to fuck somebody up, but you're not going to intimidate them any longer.

Find out what? Nobody is fucking around with you, and you haven't fucked anybody up yet.

Find out what? by The Original Agahnim September 8, 2021