noun, noun or participle which takes 'suru', transitive verb
hit it and quit it; fuck and chuck; smash and dash
Vulgar slang for having sex with someone and then immediately cutting off contact. Often used critically to describe irresponsible or callous behavior. The noun form can be used with する to mean 'to do a hit-and-run' sexually.
See also: やり逃げ
あいつはいつもやり捨てばかりしている。
That guy is always just hitting it and quitting it.
やり捨てするような男とは付き合いたくない。
I don't want to date a guy who would just smash and dash.