Top definition
1.To be bored.

2.Not liking something.

3.Can be associated with wanting food. (hunger)

Person1: I am so mentally unsatisfied (MU).
Person2: I've been mu all day.

Person1: I am mentally unsatisfied with not having anything to do.
Person1: i am mu with my grumbling stomach.
Person2: Eat something.
Person1: brb
by ilikethecoloryellow May 01, 2009
Get the mug
Get a Mentally Unsatisfied (MU) mug for your cousin Riley.