Function very well, have a good effect or outcome, as in That knife-sharpener works like a charm, or Her deferential manner worked like a charm; he agreed to everything they'd asked for. This expression uses charm in the sense of “a magic spell.” [Mid-1800s] Also see work wonders.

What means like a charm?

: to produce a desired result very easily and effectively : to work very well The cleaning fluid worked like a charm on the carpet stain.

What does it mean to call someone a charm?

People with magnetic personalities, who make you want to hang out with them, have charm and are therefore considered charming. Also, to charm someone is to attract them and win them over.