Definition of boys' play in English:

boys' play

noun

rare
  • Play or activity befitting a boy; (hence) something trivial or easy to accomplish; = child's play.

Origin

Mid 16th century; earliest use found in Thomas Elyot (c1490–1546), humanist and diplomat. From the genitive plural (or perhaps originally the genitive singular) of boy + play, probably after child's play.

Pronunciation

boys' play

/ˈbɔɪzpleɪ/