(adjective) hard or erect
as soon as she dropped her underpants, I was up.
Sexually penetrating another person, usually man-to-woman.
Get up her, man, the world ain't gonna repopulate itself.
[Up] is not [Down].
The direction facing away from the field of gravity that most affects the traveler.
The elevator took us up to the seven-and-a-half floor.
The direction above you, unless you are upside down.
Man, I was just sitting there and I was like, "Man, when I look up I see the sky."
The ending for just about every city in Western Australia.
Noongar for 'place of'.
Joondalup, Karrinyup, Dandalup, Dwellingup, Nannup, Yallingup, Manjimup, Boyanup etc.
UP can stand for UnderPowered, in contrast to [OP], Overpowered. It is used mostly in RTS forums for indicating a weakness in a unit, civilization, ect.
The Chinese anti-cavalry units are way too UP, as they have nothing to counter the splash attack of French Gendarmes, please fix it mods.