Green’s Dictionary of Slang

1. (Aus., also dargie) a hot dog.

1949

R. Park Poor Man’s Orange 182: The hot-dog man [...] warbled monotonously, ‘Carm and getcher dargies!’.

2. (Aus. prison) one who is accused of bestiality.

1990

Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Doggy. Epithet applied to someone accused of bestiality.

3. see dog n.² (3a)

4. (US) a sadomasochistic scenario where a 'slave' is forced to mimic a dog, wearing a leash, barking, walking on all-fours, etc.

1989

Murray & Murrell Lang. Sadomasochism (1989) 60: doggie 1. Kind of humiliation in which one person makes the other perform or act like a dog.

5. rear-entry sexual intercourse.

1998		R.G. Barrett Goodoo Goodoo 127: ‘How about I [...] put my sweet little backside up in the air?’ ‘A doggy, Woody?’ ‘Mmmhh. Think of it more as a pussy catty’.
2000		R.G. Barrett Leaving Bondi (2013) [ebook] She got on top. They had a doggy. A sixty-niner.
2009		R. Milward Ten Storey Love Song 34: [A] a great shag: one hour and thirty-three minutes of missionary, doggy, legs in the sky, blow-job, cunnilingus.