1. a giant nipple that is the size of a McChicken, usually on a fat person.

2. When the people at McDonalds mess up your order and accidentally give you something that you find extremely gross.
1. OMGZORZ DUDE I HEARD TANIS'S MOM HAS MCNIPPLES.

2. Wow, i ordered a McChicken and this is what they gave me? this is a freakin' McNipple.
by JellyFishies August 06, 2010
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A name that may be given to someone (usually male) who has incredibly pointy nipples and has many tendencies that suggest homosexuality such as reading Grazia magazine or straightening their hair.
"Man have you seen that guy? He's a right Poofy McNipples"
by Ruairidh May 27, 2008
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When someone has 3 nipples.
Katie was born with a Triple McNipple, although she said it turned into a mole later in life.
by birtha April 30, 2005
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