To (prospectively) have penetrative
sex with a female.
Possibly of Australian origin, this jocular euphemism for sexual intercourse is typically used by
men discussing the attractiveness of a specific (but non-present) woman.
The phrase may be a derivation of the derogatory
joke "She's so loose, it was like chucking a chipolata up the high street" in which the male speaker not only slanders the large size of the female subject's
vagina, but also disparages the size of his own penis.