Did you mean rap?
rap
noun
°A sharp blow with something hard.
"The teacher gave the wayward pupil a rap across the knuckles with her ruler."
°Blame (for something).
"You can't act irresponsibly and then expect me to take the rap."
verb
°To strike something sharply with one's knuckles.
°To speak lyrics in the style of rap music.
synonyms: fall, knock