Rap, n. [Perhaps contr. fr. raparee.] A popular name for any of the tokens that passed current for a half-penny in Ireland in the early part of the eighteenth century; any coin of trifling value.
Many counterfeits passed about under the name of raps. Swift.
Tie it up so tight that you can't touch a rap, save with her consent. Mrs. Alexander.
Not to care a rap, to care nothing. — Not worth a rap, worth nothing.