strike (one) (as) funny
To cause one to laugh or be amused; be humorous or silly to one. Humor is such a subjective thing. Something that strikes me funny might be totally inappropriate to someone else. She didn't know why, but picturing such an imposing figure being cowed by the meek civil servant struck her as very funny.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
strike someone funny
Fig. to seem funny to someone. Sally has a great sense of humor. Everything she says strikes me funny. Why are you laughing? Did something I said strike you funny?
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.