Euphemism for someone who keeps their legs closed, to avoid copulation (sex).
Usually in reference to a female, who keeps her legs crossed, to signal that she is unwilling to engage in intercourse.
Is not gender specific, however.
A term to refer to a person who prefers not to engage in actual intercourse, though it doesn't necessarily refer to one who is objecting to sex, just the actual penetration aspect.
Abbreviation for 'cross legged'.