Top Definition
A gender-neutral expression for masturbation or jacking off. Can be practiced, experienced, enjoyed or researched.
Yesterday my mum busted in while I researched the eigensex, entirely disrupting my physical experiment.
by paniq January 25, 2006
When one (typically a female) has a sexual intercourse encounter with a one eigendick (typically a male) and reaches the point of Eigenasm and cums everywhere
Yo Dubin I had Eigensex with that smut from chi-o last was Eigengood..possibly the best Eigensex I've ever had.
by Eigensaw March 25, 2009
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.