Used when referring to a relationship, to describe a lack of any commitment to the relationship. It is meant to conjure an image of one using one's partner as mostly something to prop a leg up on in bed.
"Dude! You and Sandy getting serious? When's the wedding?"
"Nah, it ain't like that. Just needed to prop a leg."
"Nah, it ain't like that. Just needed to prop a leg."
by drumb and drumber October 19, 2017