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1. Recklessly, extremely, as in We ran like hell to catch the train. [Mid-1800s]
2. Not at all, on the contrary, as in You think I'll call her stupid? Like hell I will! or Like hell I can't say that to Bob. [Late 1800s]
1 (informal) very hard, very much, very fast, etc. in an effort to do something: I had to run like hell to catch the bus.
2 (spoken) used to give emphasis when saying no to a suggestion, idea, etc: ‘He thinks you’re going to lend him your car this weekend.’ ‘Like hell I am.’(Some people find this use offensive.)
1. Used as an intensive: He ran like hell to catch the bus.
2. Used to express strong contradiction or refusal: He says he's going along with us—Like hell he is!