1. Noun

   queue jumping; breaking into a line; muscling in on; wedging oneself in; interruption; sharing a theater box (theatre)

2. interrupt

   Computing

3. wedge

   Go (game)Usually written using kana aloneusu. ワリコミ

Also written 割込み【わりこみ】warikomi、割込【わりこみ】warikomi