look up any word, like fellated:
1. Last name given to someone who is completely epic.
2. This title can be self proclaimed or given by a friend or friends. Unless one has experienced a McBeastin, one may not name a McBeastin.
Megan Mcbeastin is the coolest person around!
by That Kid, December 31, 2008

Words related to McBeastin

epic full of win green eggs and ham win