Top Definition
Promoting growth of the milk glands.
Ex. 1:

Any straight guy is mammogenic of his girlfriend's (or maybe the girl he sits next to in science class) breasts.

Ex. 2:

George: Dude! I swear Natalie's tits got bigger over the weekend!

Eddy: Yeah, I hear she's mammogenic of them.

Ex. 3:

A good mother is mammogenic for her baby, and a good wife is mammogenic for her man!
by The Guy Who Likes Muffins February 22, 2011
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