look up any word, like pussy:
 
1.
Mcdub is dub that is too thick, means fat sac of weed.
That dub was thick that dub was thick as hell like a mcdub.
by Clay Hembree Rob Mnoser March 27, 2009
 
2.
A different name for McDonald's to make it so you dont seem like a fool for saying McDonald's.
Yeah dude lets go hit up McDubs, I hungry.
by kingshagman July 23, 2011
 
3.
A small town in Pennsylvania noted for its lack of anything to do.
Bob: "Come on man, let's go to Pittsburgh."
Tom: "Sure, McDub is so boring.
by Chilly C March 08, 2009