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American Slang/Idioms starting with K | NEXT PAGE
Keel over (v.): A rude way of saying "to die".
(To be) keen on: To like; To be fond of; ex: "I'm not really keen on this idea."
Keep a straight face (v.): To be able to listen to something that you want to laugh at but to not laugh, to suppress the laughter. ex: "I couldn't keep a straight face."
Keep (one's) cool (v.): Not to become upset, agitated. ex: "I'm surprised he was able to keep his cool."
Keep an eye on (v.): To watch. Be mindful of. ex: "Keep an eye on those kids. They look suspicious."
Killer (adj.): Great; amazing. ex: "A killer new application", "A killer new product"
Klutz (n.): A clumsy person. ex: "My brother is such a klutz - He's always bumping into things and knocking them over."
Knock (v.): To talk negatively/badly of; to criticize, badmouth. ex: "Don't knock it until you try it/ until you've tried it."
Knock (someone) up: To get (someone) pregnant; Knocked up = pregnant.
Know it all(n.): Slightly derogatory ( =insulting) term to describe a person who thinks that he/she knows everything.