look up any word, like cunt:
 
1.
There is no reason you should not do something.
Me es igual si lo hago. Por eso, pienso hacerlo.
No me costaría nada hacerlo. Por eso, pienso hacerlo.
Since I have to wait, I might as well sit down and relax.

It makes no difference whether you steal a lamb or a sheep, so you might as well steal a sheep.
by Hal King March 14, 2007
 
2.
Doing an action, when you don't feel like doing it...
i don't feel like having sex right now...umm might as well
by A.I November 07, 2006