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American Slang/Idioms starting with O | NEXT PAGE
Off-color (adj.): Rude. ex: "An off-color joke", "An off-color remark".
Off the wagon: To be "off the wagon" means to start drinking (alcoholic beverages) again after having stopped for a while.
On again off again (adj.): Used to describe something that is not stable, permanent. ex: "They had an on again off again relationship for years."
(To be/get) onboard: To agree to, or be part of something (usually a plan, strategy, etc.); ex: "I'm glad that all the partners are onboard."
On cloud nine: Extremely and visibly happy ex: "She was on cloud nine when she heard the news."
On edge: Nervous; Anxious. ex: "To be on edge."
On the level: Honest. ex: "I'm pretty sure he's on the level."
(To be) on the same wavelength: To understand each other; to see eye to eye.
One: Similar to "very". ex: That's one large pizza! = That's a really large pizza; He's one smart man. = He's a very smart man.
Out of one's mind = Not normal, not "all-there" ex: "You want to go for a walk at 2:00 AM? Are you out of your mind?"
(To) outdo (v.): To do or perform better than someone else. ex: "He bought his mom a car, but his brother outdid him by buying her a house."
Over: "Over" is often used to emphasize location. ex: "I live over on Orange Street." (I live on Orange Street). (To) overstep (v.): To be out of line. To say/do something that's inappropriate to a situation. ex: "I'm sorry; I overstepped. I shouldn't have said those things to your parents."