Buckley (1780-1856) was an English convict sent to Australia who escaped and survived against the odds for 32 years - living with local aborigines. Everyone had given up on him. Although he survived, the phrase is often used to indicate no hope or chance at all, which is what was thought of they guy until he later surrendered to white settlers.
The one of a kind technique where the male's testicles are rubbed anti clockwise three times, kissed left to right twice, then finished off with a flick to the end of the penis. This technique has been proven to make the male last 3x as long but comes at a painful price.
"Listen bruv, if that hoe hadn't have gave me that Buckley ball rub, I'd have bust a nut before it went it!"