1. to be totally in control of a sitution.

1. Can you handle dealing with this idiot, I'm on it "like a fat kid on a donut!"
by dantmann March 05, 2009
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fuckin' tight as shit band from oly washington
human #1: did you check out Fat Kids Sink Fast yesterday?
human #2: fuckin' yeah and they were tight as shit.... anyways hand over your wallet or i'll fucking kill you
human #1: wait a second what the fuck! when did this turn into a mugging? this was just supposed to be an example.
human #2: yeah and now its an example of a fatal stab wound to the gut. *stabs human #1*
human #3: holy shit! whats going on?!?!?!
human #1: its not what it looks like... *stabs human #3 and runs*
by meth head October 07, 2007
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To be very much on something or all over something; like white on rice; very attracted to something. The term is especially appropriate to use when describing the attraction of a drunk male to a fat chick, or hogging.
Whoa, look at that hot chick with big tits. I'd love to take her home with me. I'd be all over that like a fat kid on cake.
by PMax October 12, 2008
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To snap on someone, usually following it with extreme violence. Comes from the short video clip on the internet in which it says "Sometimes... the fat kid... just ain't hungry!" and follows with some kids throwing some (presumably) food at a fat kid, and he just walks over and punches one of the kids in the face.
"I hate Duncan, I'm glad he's gone. It's too bad we never got to see anyone go 'fat kid ain't hungry' on him."
by FunkRenegade August 30, 2005
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the potential result of an overweight person having to endure any of the following life threatening events:
1. too much time without food
2. too much of the same food-i.e. 100 candy bars
3. exercise
"man, if i dont eat soon im gonna have a fat kid heart attack"

OR

"let the boy take a break from running before you give him a fat kid heart attack"
by fadedredwing May 13, 2009
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1) a phrase that is easily exchangeable with the phrase that's so gay.

2) can also describe a moment when someone cant stop talking about food.
Guy 1: How could you fail that test it was easy!!
Guy 2: Yeah, well....your mom!
Guy 1: Dude, that's so fat kid.
by Maddi X February 02, 2010
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When someone who was previously a fat/unattractive child loses weight or "glows up" and overcompensates for their past insecurities by acting out. Usually they end up acting like the same people who bullied them growing up.
Friend 1: Emily lost weight and now acts like she's better than everyone.
Friend 2: classic Former fat kid syndrome.
by 1234456hjk July 22, 2020
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