Top Definition
NMK
New Mama Knockers. When a woman's breasts become humongous due to pregnancy. However, mentioning this to a pregnant woman (an incredibly hormonal pregnant woman) may earn you a slap to the face.
Pregnant Girl: "I'm due in a month!"
Impressed guy: "I can tell, you've grown yourself a nice pair of NMK's!"
Pregnant Girl: "Excuse me?"
Impressed guy: "Huge tits."
Pregnant Girl: "...Excuse me?!"
by xrobotlove February 12, 2011

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