look up any word, like swag:
 
2.
When a guy during sexual intercourse rapidly goes between a girls vagina and her asshole.
Ashley was sore in two places, after Sherwood was done Half-Assing her.
by SomeoneYouProbablyDontKnow July 30, 2008
 
1.
half hartedly working to achieve an objective.
Many college students are half assing their way through classes.
by kalina ontriguez March 16, 2010