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1.
Where one takes a shit and the momentum of the turd carries the faecal matter through the u-bend of the toilet, creating the same effect as if the toilet were to be flushed except without the noise, hence "stealth" shit... Additionally most stealth shits also do not create any sound when breaking the toilets water surface tension.
Example 1:

Kerry: I didn't hear you flush the toilet, you better hadn't have left it in there you disgusting creature!

James: It's ok, I did a stealth shit.

Kerry: Oh that's ok, I did one earlier!
by TequilaMonkey February 24, 2012