When a heavier-set man's nipples show through his shirt. Like when it is cold and his shirt is too thin for his shaplier-than-normal breasts. Can also be used in replace of a curse word.
"Dude, look at that guy's manipples, they are the size of dinner plates!"

"That guy cut me off! What the MANIPPLES is he thinking!"
by Warrior against MANIPPLES November 06, 2009
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