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When a person places fecal matter between the mattress and box spring. Thus resulting in a special surprise upon discovery. Common joke between eastern European males between the ages of 17 and 22.
"I just left a Russian easter egg in his bedroom!"

"She is going to be pissed when that Russian easter egg does not scrub out of the mattress."
by Firedude1980 October 11, 2014
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