A form of late-night, drunken intercourse where the penis does not fully penetrate the vaginal cavity. This is usually is the result of a girl's last minute decision to discontinue intercourse.
Me: Sara, did you you sleep with Chad last night?
Sara: No...not really...I mean, I was going to, but then I felt like throwing up cause I was SO wasted. So it was just a halfer.
Sara: No...not really...I mean, I was going to, but then I felt like throwing up cause I was SO wasted. So it was just a halfer.
by Sororislut December 11, 2008