1 definition by MJ Cesco

CMU

Used as an acronym in text messages for "Cracking myself up". To be so awesomely funny that you amuse yourself with your own jokes or actions. Others may or may not find the same humor funny....but you could care less.

Text message:
I can't believe I fell off my chair. In front of everyone. CMU.

by MJ Cesco March 20, 2013