Green’s Dictionary of Slang

1. to have rear-entry or anal intercourse.

1867		Rosa Fielding 82: Then placing her on her hands and knees on the floor, he dog-fucked her, to the intense admiration of Mr. Bonham.
1980		E. Folb Runnin’ Down Some Lines 235: dog fuck Engage in anal intercourse.
1981		L. Bangs in Psychotic Reactions (1988) 348: When they were done dogfucking they sprawled back awhile to rest and pant and contemplate.
1996		Eros ‘Neighborhood Slut’ on Alt.sex.stories Archive 🌐 Marcy’s cunt melted around his prick, and she whimpered and wiggled like a bitch in heat as he dog-fucked her frantically.
2001		‘Randy Everhard’ Tattoo of a Naked Lady 272: Slumped over her backside Roulette doggied Bunny.
2005		Jade LB Keisha the Sket (2021) 68: I thought of da day ricardo doggyed me.
2007		J. Marsh Soul Crew Seasiders 26: They had two paper mache Swans on the pitch, big buggers, and a Cardiff fan ran onto the pitch and proceeded to doggy fuck them.
2017		1011 ‘Kill Confirmed’ 🎵 Doggie that bitch in my yard, now her friend says she wan’ do man.
2020		G. Krauze What They Was 147: I just want to [...] flip you round [...] and doggy you mad hard.

2. attrib. use of sense 1.

1978

P. Gronowski Rough-ridin’ Studs n.p.: [He pulled] him partially off the mattress until the blond was in a doggie-fuck position.