Green’s Dictionary of Slang

1. to excrete.

1943		C. McCullers Heart is a Lonely Hunter (1986) 332: ‘Home to hockey,’ Jake said. ‘I got to hockey.’.
1985		Eble Campus Sl. Apr. 5: hockey – to defecate.
1992		Eble Campus Sl. Apr.

2. (Irish) to defeat heavily [shit on under shit v.].

2021

P Howard Braywatch 95: ‘Blacxkrock will hockey us’.