like hell

Adverbial like hell has 2 senses

• like hell(r = adv.all) like crazy, like mad, like sin, like the devil, like thunder - with great speed or effort or intensity; "drove like crazy"; "worked like hell to get the job done"; "ran like sin for the storm cellar"; "work like thunder"; "fought like the devil"
• like hell(r = adv.all) - used ironically to indicate the opposite of what is stated; "says he'll help me? Like hell he will!"