When an in the closet gay man, gets drunk at the bar and makes out with other men to show off that he doesn't have to be gay to make out with other dudes.
A non-gender-specific (nomrally sober) person who usually arrives at the bar near closing with the primary mission of finding someone drunk enough to have sex with.
I see the barsexual has arrived on cue tonight - picking up Gina (wallowing in her own vomit) - promising her a safe ride home - resulting in sloppy sex leading to much regret and vows of sobriety.