Top definition
To masturbate while imagining having sex with a family member.
George would incesturbate daily during and after peeping in on his mother while she bathed.
by jokingkong January 15, 2011
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2
"What did you guys do last night?"
"My twin brother and I attempted to incesturbate for the first time"
by Garooshnar December 20, 2016
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