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n. a persistent, irrational fear of excessively large female breasts that leads to a compelling desire to avoid them at all cost.
Chachi: Why don't you hit that chick already?
Nickarossi: I can't, dude...I've got megalomammophobia!
Chachi: Megalowhah?
Nickarossi: Megalomammophobia! Look it up, dude, it's in the DSM-IV!
by Nickarossi May 10, 2007
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