noun, noun or participle which takes 'suru', transitive verb
halfsies; splitting evenly between two
Informal, often used by children or in casual speech when sharing something equally between two people. Can be used as a noun or with する to mean 'to split in half'.
See also: こ
お菓子を半分こしよう。
Let's split the snacks halfsies.
ケーキを半分こして食べた。
We split the cake in half and ate it.