like_hell
1. [ adverb ] (informal) with great speed or effort or intensity
Synonyms: like_the_devil like_thunder like_mad like_sin like_crazy
Examples:

"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"

Related terms: colloquialism
2. [ adverb ] used ironically to indicate the opposite of what is stated
Examples:

"says he'll help me? Like hell he will!"

Similar spelling:   likely