Top Definition
THIS IS A REAL WORD! It means to chew your food.
Mom: Son, you have another phone call. Do you want me too tell them your eating diner?
Son: Yeah just tell them I'm mastacating! They'll deffinatley stop calling
by Nicole Morrow September 25, 2005

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×