Having a sexual fetish towards the human navel, usually called belly button in the fetish community.
"He , having a belly button fetish, became sexually aroused by the sight of her belly button"
by AbbyandMarc February 23, 2008
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To put your finger in someone's belly button for more than 8 seconds. It is then classed as rape.
"You put your finger in my belly button for 12 seconds, that counts as belly button rape"
by Raybabe December 13, 2011
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When a man ejaculates onto a females chest, she wipes the ejaculation with a towel but forgets about her belly button.
Your skin is so soft, oops looks like you missed your belly button with the towel. Honey you have a full blown belly button jacuzzi going on here.
by Roger Ann Lee November 30, 2014
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When preparing to perform cunnilingus on a woman of questionable hygiene, the act of slowly kissing from the breasts downward. If, by the arrival at the belly button, no odor is detected, one can surmise that it is safe to proceed. The detection of odor during the belly button test, on the other hand, is a dire indicator of the presense of vagimite. Reverse course immediately and escort female to the nearest clinic.

See also: vaginosis, stank, yeasty.
Guy #1: Dude, I was hookin up with this redhead hottie from the bar, but I started to go down on her and she failed the BB-Test!
Guy #2: My sister is such a whore.
by CPatch February 1, 2005
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Having sex. Getting jiggy with it. Laying gravy on the mashed potatoes.
Yo dude.. I'm totally trying to bring this drunk girl home to bump belly buttons! I'll see if she has a friend for you.
by EHarrisPhilly April 5, 2011
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A Game invented in the twilight FanFiction, 'Progress'. When a friend holds you down and digs their pointer finger into their belly button before pressing it to your top lip; thereby leaving a 'Hitler' mustache of funky stink on your upper lip.
He's threatening us with Belly Button Hitlers and it's making me gag!
by AnotherFreakyBitch September 9, 2010
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