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1. N. A penis which is the approximate size of a peanut. Not a mispelling.
That guy took too many steroids, now he has a peanus.
Peanus by Mule_Hammer September 14, 2005
A corruption of the word "Peanuts". Originating from a poll on the wordIGN Boards/word by user DcPunk, which was meant to be called "What's your favorite type of peanuts".

Instead, the poll looked was asking people to choose between salted or roasted "peanus".

The word has been absorbed as part of standard issue Internet-speak, and literally means "penis".
OMG uRghey now stik ur peanus in my but kthx
Peanus by Mr_eX September 8, 2003
My peanus itches.
peanus by ugglet October 8, 2019
The process of sicking your own penis inside your own anus
(Verb)
Did you try the peanus last night?
Peanus by Theseeroffandom January 11, 2017
Penis and anus combined.
I want someone to lick my peanus.
Peanus by LemonsAnnish September 22, 2015
mr ex is a nerd lol
peanus by smart guy April 25, 2004