Green’s Dictionary of Slang

1. usu. of a woman, to make intercourse unsatisfying or even impossible.

1978

R. Price Ladies’ Man (1985) 173: It would be a most unhappy and rageful screw, a grudge hump.

2. usu. of a woman, to have intercourse with a third party as an act of revenge or anger towards a partner.

1974		P. Gent North Dallas Forty 38: ‘That Beaudreau is a cocksucker. [...] I’d like to grudge-fuck his girl,’ I said. ‘That’d teach his ass.’.
1990		S. Morgan Homeboy 171: To avenge the crack about Joe, she grudgefucked Dan.