Green’s Dictionary of Slang

1. unpleasant, disgusting, a general term of abuse.

1969

‘Iceberg Slim’ Mama Black Widow 83: You nasty dick sucking bitch, stay away from my husband.

2. effeminate, homosexual.

1975		J. Roe The Same Old Grind 120: ‘You sure you’re not some dicksucking fruit? Do you take it up your ass?’.
1976		P. Conroy Great Santini (1977) 371: The most limp-wristed, lily-livered, dick-sucking squadron in the history of flight.
2000		F.X. Toole Rope Burns 183: You muthufucka slave-tradin’ po-lice dick-suckin faggot piece a redneck dogshit.