Something you say to trick someone into saying underwear.
"Hey, what's that under there!
"Under where?"
"I just made you say underwear!"
by Vee Are Are Schee March 14, 2004
To feel like you are going to/or have become dangerously intoxicated

being too high or drunk and subsequently taking a turn, for the worst.
"Dude, I am going horribly under"

"Lukes gone under"

"I just went so under"
by SweetWinn November 5, 2011
A character who agrees as much as possible to become as close as they can to their love interest. They do pretty much whatever their love wants. This always leaves them open for manipulation due to not thinking about the consequences, always saying "un, un, un!" (yes, yes, yes!)
Character 1: Why is Sarah doing everything Jack says and wants?

Character 2: Oh she must be a Undere if she's following him around and doing as he says.
by sxmmp November 25, 2020
1. broke. not having any money.
2. undercover. not wanting to be seen or not wanting to cause attention to oneself.Being ducked off somewhere.
1. We need to buy some more Remy, you got five on it or are you under?
2. Too many people are getting killed, I'm gonng be on the under.
by reek daddy May 7, 2006
Amusing non-sequitur single word joke and/or punchline, all in one. Originated by Sacha Baron Cohen and seen first in Borat. Respect. Endlessly abused, yet appreciated ever since. Often used to initiate or terminate a conversation, or as rejoinder.
Lawyer: I have to go.
Musician: Under.
Lawyer: Under.

Lawyer: Where is the pastille?
Musician: Under the newspaper.
Lawyer: Under.
by Avocado58 September 17, 2009
the act or statement of being under a given object.
bill: "hey what are you doing?" jim:"oh just be-undering the bed."
by walking orange January 2, 2019