Definitions of caper:

noun: a playful leap or hop
noun: a crime (especially a robbery)
noun: pickled flower buds used as a pungent relish in various dishes and sauces
noun: any of numerous plants of the genus Capparis
noun: gay or light-hearted recreational activity for diversion or amusement
noun: a ludicrous or grotesque act done for fun and amusement
verb: jump about playfully
name: A surname (very rare: popularity rank in the U.S.: #58123)