look up any word, like dirty sanchez:
 
1.
To do something with little effort.
Not completely done.
Poorly done.
Little or no effort is used in the job/activity.
"Why did you do a half ass job cleaning your room? There are dirty clothes under your bed."

1: "How did you get a 57% on that essay? It was easy."
2: "I did a half ass job writing it."
by casey11 July 23, 2007
 
2.
Something done poorly, a bad job, a rushed task the person could have done better at.
I told him to clean his room and he did a halfass job!
by The Anonymous1 February 09, 2004
 
3.
(adj). Something incomplete or downright lame, disappointing in its partial quality. Often a task given to a teenage student is done in a half-ass manner.
You are an hour late and telling me you couldn't get a cab? That's a half-ass excuse!
by Sasha Henke February 02, 2006
 
4.
1)done half-way
2)No done with quality
Frankilton half-ass did the work
by colten July 10, 2003
 
5.
The act of doing something without motivation or care as to the quality of the object at hand. To not give a shit.
Jon: "Damn we have a paper due tommorow?"

Chris: "Dude, don't fucking half-ass that shit."
by Cali4niaBreez October 04, 2005