RhymeZone: pattycake definitions

Definitions of pattycake:

noun: (games) A children's game in which two people alternately clap their own and each other's hands, often to the accompaniment of the nursery rhyme "Pat-a-cake, pat-a-cake, baker's man".
noun: (colloquial) A childish or time-wasting activity.

(Definitions from Wiktionary)