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1.
A older college student who gets off by picking up fat drunk highschool chicks.
Man i cant believe Kayla fucked that Mcmullan
by drunk high school chick February 05, 2009
 
2.
A pikey, a down right scoundrel, scum bag, dirtbag, anything with the word bag at the end defines mcmullan. It is well known that the mcmullans that they often steal from the mcmullan charity. Holding innocent people at ranson until they get the so called charity money.
Put your hands up this is a mcmullan
by ChloeRedfearn May 04, 2011