In a rap battle, feeding is when you make your opponent eat their own line - you use it against them, or flip it on them.
Lotto: Fuck Lotto? Call me ya leader
I feel bad that I gotta murder that dude from Leave It To Beaver
I used to like that show

B-Rabbit: Ward, I think you were a little hard on the Beaver
So was Eddie Haskal, Wally and Ms. Cleaver (pointing at Lotto's gang)

Spectator: ZOMG! Eminem was feeding that dude's lines! Friggin awshum!
by Gwame October 6, 2007
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The act of giving food or drink to a child.

as in pediatricfeeding.com
His mother was feeding him.
by feeding T March 15, 2016
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When a girl grinds her butt on a guys dick while they're dancing close on a dance floor.
That last chick I was just dancing with at the club was feeding the shit out of me last Saturday. My dick was sore for days.
by Big Hypno September 25, 2006
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Describes an embarrassing loss or display of wetness
5-2, feeding ceremony
5-1 or 5-0, feeding FRENZY
by Chowda! October 11, 2004
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It's the end result when a (much) older woman has sex with a younger lad, with tasty results. When the moment of truth comes, it's time for him to Feed Nana!

The phrase is known to have a compound meaning but this is the most widely accepted. It is believed to have originated from Alt-Right podcaster Anthony Cumia just before he was permanently suspended from Twitter in 2018.
Him: "Where should I finish?"
Her: "Feed Nana"
by brotherman brotherman September 7, 2018
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1. Taking a shit. You are the source of "food", and Demetri is the toilet. This is secretive way to communicate when you want too keep your bathroom use private.
Joshua : There are so many options in this food court, I'm thinkin we go with Panda Express.
Geoffrey : Dude, I'll be back shortly. I'm gonna go feed Demetri then I'll have room for some Beijing Beef.

Example 2
Sara : OMG Rach, those new Nacho Fries from Taco Bell were totally lit.
Rachel : Damn girl, Demetri will be eating well soon.

Example 3

Thomas (in bathroom) (in Russian accent) : EAT DEMETRI EEEEAAAAAT!!!!!

Nicole : What the fuck is he doing in there?

Henry : He's just feeding Demetri, Fireball and Hot Wings always do this to him.

Angie : Yea, the last time this happened, he had to perform Heimlich on Demetri, thankfully we had a plunger.
by BigBunny4482 February 23, 2018
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