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The unfortunate occurrence of a bowel movement that crests the rear band of an infant or toddler's diaper, resulting in yellow, curdy staining of the child's back and clothing (and often furniture, parents, and household pets).

The act of producing a shitback

Having characteristics of shitback.

See also shitleg and shitbaby
Oh no, the kid's got shitback!

Quick! Grab the change pad, he's shitbacking!

These diapers suck - he's all shitbacky.
by ochawan August 19, 2008
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the act of taking two people and tying them back to back, then giving then 7 or more laxatives, then only let them use one toilet, thus creating a very disgusting, repulsive game
tyler: hey, do u wanna play shit backs
jarrod: yea, ill grab the laxatives
tyler: hokay, ill be in the bathroom
by walden8starz June 29, 2008
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Usually a kickback with a-lot of dudes getting stoned and drunk with no girls fun but lame.
Dude I don't want to go to eddies again it's bout to be a Shit-Back
by T-Rav-IS April 08, 2007
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the art of quickly replying to someone shitting on you with an even better reply that outshits them.
Nicole: ....okay cool Sean Murray
Dayshon: Fuck you Nicole....
Dayshon to Morgan: Damn Morgan why dont i have a shitback when i need it.
by Sean Murray-Manuel May 06, 2010
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Shit Back

Often used by my girlfriend.

A person that smells like shit, is overweight, and doesn't want to hang out with his girlfriend.
Ronnie, You are such a fucking Shit Back.
by Ronnie January 04, 2005
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A person who is regularly subjected to the wiping of dog faeces onto his back without his knowledge
Oi, shitback, you've got shit on your back!
by andy January 19, 2004
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