A "weak" mustache that is grown by a 15 or 16 year old that doesnt shave. Mexistashes consist of just peach fuzz.
"Al has a mexistash"
by will November 29, 2003

I have a thing for guys who have a mexistash!
by fghjkjh February 25, 2008

by Miiiiikkkkkeeee April 29, 2008

by anonymous...u no who i am chasye April 24, 2006
