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American Slang/Idioms starting with U | NEXT PAGE
Up for grabs: Available (for the taking); ex: "The jackpot is still up for grabs."
Uncle Sam: The United States government; ex: "One fourth of my salary goes to Uncle Sam."
Up in the air: Unresolved; Undecided; Uncertain. ex: "The election is still up in the air. Either candidate could still win."
Up one's sleeve(to have something up one's sleeve): To have a secret agenda, to be up to something, to be planning something. ex: "I don't trust him. I just know he has something up his sleeve."
Upbeat (adj.): Positive. ex: "Brendon's always really upbeat."
Upper crust: Upper class. The richest, most important people in a certain society.
Uppity (adj.): Presumptuous and arrogant.
Uptight (adj.): The opposite of "relaxed" or "laid-back". Overly conventional in one's opinions, tastes. ex: "I'm a rebel, but my parents are really uptight."
(To be) up to: To be planning; "He's up to something" = "He's planning something"; "What are you up to?" = "What are you doing?"
(To be) up to no good: To be planning something bad.