Oversized, "SuperSized", breast augmentation. A boob job that's way out of proportion with a woman's body.
I wonder is she has the McMansion to go with her McBoobs?
by Shaz Ma Taz November 15, 2007
Men or boys developing large protrusions of the chest for eating too much McDonalds.
Look at the McBoobs on that guy.
by DrkTy October 05, 2004
Manboobs caused by eating McRibs.
Greg developed McBoobs after eating a daily McRib.
by Tinkerbell Hilton January 26, 2011