An umbrella term for any object smuggled within one's anus (keister).
The guard gave me a good pat-down, but didn't detect my hidden keister egg.
by DieByTheChord June 5, 2011
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On Easter Sunday the priest makes sure to check every alter boy for hidden eggs in their rectal cavitity.
On Easter Sunday, Father O'Brien did a "keister egg hunt" and searched every ass in the church for hidden eggs!
by StiffPeter1015 March 31, 2018
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