tentacle hentai 

A form of anime or manga, part of the hentai genre, where some kind of strange alien creature shoves its tentacles up a girl's vagina.

Save the schoolgirls! Use tentacle free products!
(An anti-tentacle hentai button I got at Nan Desu Kan '10)

tentacle hentai by hai_bai November 8, 2010

tentacle rape

A type of adult anime or hentai which features characters (stereotypically and disturbingly young females) getting sexually violated by penis-shaped tentacles of a demon or mollusk or malfunctioning machine. Usually the tentacles produce an impossible amount of semen, and in some cases, the victim is fucked to death. How somebody can create or even get off on that shit is beyond all known logic.

Wapanese otaku are known to masturbate furiously to tentacle-rape hentai pics.

tentacle rape by otaku killer September 2, 2003

tentacle rape

Usually in adult-oriented Japanese Anime, when a large tentacled monster violates a woman in several orifices with his tentacles.

Also used synonymously with phrases like "took it up the ass"

Man, I got fucking tentacle raped at work.

tentacle rape by Omniverse March 27, 2003

tentacle rape

The act of sexually assaulting a woman with tentacles. Since no human being can really sprout tentacles, this is generally restricted to Japanese Hentai. A versatile entity, such as a robot or alien, can perform tentacle rape on multiple victims at the same time.

Guy: you're a freaky slut aren't you
Girl: yea baby, give it to me
<Guy sprouts tentacles and rapes her orfices>

tentacle rape by blarg July 7, 2004

tentacle porn 

Any of a wide variety of primarily Japanese hentai anime films, dealing with demons or space creatures with multiple appendages not unlike tentacles. Many are either naturally occuring shapes i.e. round with suckers, or often times have genitalia, usually of the masculine variety. See hentai, sailor fuku, and anime for additional info.

Wow!! That was so amazing! Did you see the way those things pounded her? That is straight tentacle porn, my friend!

tentacle porn by Anaksunaman June 19, 2004

Tentacle Yaoi 

A fandom involving bishis getting anally abused my tentacled plants or monsters.

Often popular with teen girls.

girl 1: *posts on a message board* Anyone want to roleplay some tentacle yaoi

*5 minutes later*

Inbox: you have 50 new messages

Tentacle Yaoi by y11er August 25, 2008

Tentacle Nipples 

1. A horrific physical condition, probably genetic, in which tentacles extend from one's nipples in correlation with one's bitchy emotions. The tentacle nipples emerge extensively during full moons, sometimes stretching for miles and miles, wriggling grotesquely.

2. A nickname for one who suffers from said condition.

I wouldn't go for him if I were you; he has tentacle nipples.

Tentacle Nipples by HarlotHolla March 14, 2011