The word " Penis " spelled " Penus " on purpose to avoid the chat filter used in chatrooms/online multiplayer games. Also used by kids who can't spell.
you: heheimma type penis in urban dictionary
*typing*
*enter*
you: shit i misspelled it
*penus*
By Natty
Penus
Verb.
The abbreviated term for gay male intercourse (Penis+Anus= Penus), when the male genitalia penetrates into the anal sphincter, massaging the male prostate gland.
Also known as anal sex, buttsex, and fudgepacking.