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8.
The incorrect plural of the word 'octopus', using a Latin ending for a word ending in 'us', by replacing it with an 'i', as in 'octopi'.

In English, it is correct to say 'octopuses', first used by uneducated peasants who did not know of the word's Greek origin, however, it is still technically incorrect.

The word 'octopus' is Greek (octo=eight, pus=foot), therefor, it's ending should be a Greek ending. The Greek ending of the word 'octopus' is 'octopodes' (pronounced: Ock-Top-Oh-Dez).
Octopi is the number, eight multiplied by pi, so is 25.13274123...
by Octopodes December 08, 2010
 
1.
A drummer with a gigantic, gigantic ego. This species is egocentric beyond all non-suspended belief. Nearly bad enough to be institutionalized, but not quite.
Luckily, there are few of these. The Octopus thinks he is the shiznit Macdaddy and this attitude leads to an amazingly underachieving, underperforming, failure of a career as well as the failure of a human being. Sad, but on the positive side it is an object lesson.
by green party April 11, 2006
 
2.
A creep who touches as many girls he can get his hands on and seems to grow hands with the consumption of alcohol or when submerged in a hot tub.
That octopus groped Dotty when she was climbing a ladder.

That freako octopus fondled my jugs when he was pouring a beer in the hot tub.
by Sri Lankan Catnap January 17, 2009
 
3.
an octopus with 3.14 arms
the octopi is a very rare and endangered species that is located is the south pacific
by bugante October 12, 2007
 
4.
An attempted pluralization of the word "octopus". "Octopus", however, does not pluralize as most other words ending in "-us" borrowed from Latin. The proper Latin plural of "octopus" is "octopodes" (pronounced in English "awk-t@-POE-deez"). Saying "octopodes", however, is like pronouncing the first "r" in "February"--something seldom done and appreciated, however greatly, by very few. Your best bet is just to stick with the good old English pluralization, "octopuses".
While the two syllabontes of our mollusk neurobiology class differed in some ways, they both mentioned a discussion of how octopodes *octopi, while certainly not as intelligent as homines sapientes, were nonetheless the smartest of the invertebrata.
by atemperman January 25, 2004
 
5.
A cat that only has one life left.
This daffynition of octopus appeared in the B.C. Comic Strip, Octopu... er I mean, October Oct... er, I mean October 8, 2006.
by Downstrike October 08, 2006
 
6.
1. An afro after it has gotten wet

2. An awesome creature under the sea.
"omg! your afro is like an octopus!"

On a boring nature program, I saw an octopus. Then the program wasn't boring any more!
by shuttershades July 03, 2010
 
7.
A guy who repeatedly trying to touch a girl despite her not wanting or inviting it.

He puts his hand on the back of her neck, she shrugs it off then seconds later he tries to put arm around her waist.

She feels harassed and tells him to f*ck right off
"Dude tried to put is arm around my waist in the gallery. I told him to back off then seconds later he tries it again. It's like fending off an octopus"
by claireg November 09, 2009