Idiot; someone who rides a penis like a it is a horse
Leave that bouncer alone you knob jocky
Knob referring to the male anatomy (the penis)
Jocky refering to a racing horse rider.
Knob Jocky would often refer to a person who is said to "ride" a Knob. It is often used to put someone down but in a more jovial way. More widely used in Australia, particularly Adelaide, Australia.
G'Day Mate, your a Knob Jocky!
John you talk so much shit, your such a Knob Jocky!
Someone who is gay, a mincer, up hill gardener, faggit, you get the picture.
Paul say "HERE! jimmy look that faggit over there."
Jimmy say " aye what a Knob Jocky.