Pound of Flesh is a phrase from Shakespeare's play The Merchant of Venice, in which it refers to a DEBT that must be paid. The crossword solutions for the term are DEBT (4 letters), THROB (5 letters), and FISTBUMP (8 letters). DEBT refers to the obligation to pay back a loan or fulfill an obligation. THROB is a verb meaning to beat or pulsate with strong emotion. FISTBUMP is a gesture of celebration or greeting, usually done by bumping fists together.