Top Definition
A "long bomb" home run as first described by Atlanta Braves career player and third baseman Chipper Jones (#10). Mammo is sometimes associated with the term "yicketty" which is a general term for a homerun coined around the same time. Both terms were made popular by the Chipper Jones tweet: (see example)
Chipper Jones: "Mike b and jhey go yicketty! The roadrunner went mammo! And the Bravos have a winning road trip. My kind of day off, no action!!!”

roadrunner-Juan Francisco
Mike b- Michael Bourn
jhey- Jason Heyward
by Dolemite350 August 11, 2012
2 more definitions
Very large breasts on a female.
Check out the mammos on that broad.
by Guli January 01, 2006
ones mother
me mammo popped me outta her fandoosh
by hambo July 06, 2003

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