you up(redirected from you up? u up)
slang A text sent to ask if someone is awake, typically as a pretense for a casual sexual encounter, especially late at night. The letter "u" is commonly used instead of the full word "you." Hey u up? He just sent me a "you up" text—should I let him come over?
See also: up
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.