Koowa 

A person, at least partially mentally retarded, also known as an old fuck. Sometimes you can spot a live Koowa in the form of a gay goldfish, usually talking about ass.

Jesus Christ better get outta here before Koowa asks you if your ass resembles a fruit!

Koowa by i am mentally retarded April 14, 2020

Koopa-Backdash-Wave-Slide-Hover-Walk-Moon-Landing 

In Super Smash Bros. Melee, characters who's walk-acceleration is lower than their traction value after wavelanding backwards can buffer a slight walk forwards to decrease the momentum lost. The walk input must be at its lowest value to perfectly execute the tech. (rough translation of inputs) Characters with low traction (Luigi) benefit worse than those with higher traction values in Melee. (i.e Gannondorf can benefit from the Koopa Backdash Wave Slide Hover Walk Moon Landing more than Luigi in terms of distance)
Youtube has more info on this.

The Koopa-Backdash-Wave-Slide-Hover-Walk-Moon-Landing can make virtually anyone feel like they are playing on ice.

Koopa-Backdash-Wave-Slide-Hover-Walk-Moon-Landing by Do_mmar September 11, 2020

koopa cat 

A phrase of which the definition or explanation is commonly asked, but actually, no one knows what it means.

-What's a Koopa Cat!?!?
-No one knows....

koopa cat by Webbie Frebbie November 11, 2013

kooka shaw

A unexpected punch to the vagina by an object or hand.

omg that Cabinet totally just kooka shawed me

kooka shaw by Watermelon Ways April 14, 2017

kooja 

‘Kooja’ (adj.) is used to describe a friend, mainly a friend(s) that you are close to. The word originated from a roblox username that me and my friends thought was unusual and funny.

‘What’s up kooja?!’
‘Heyyy koojas’

kooja by georgeweasleysgf January 15, 2021

Knowallogist 

A person who specializes in knowing EVERYTHING about EVERYTHING, regardless of whether they know anything at all.

I asked him if he preferred red or white wine and got a 30 minute dissertation on wine and viticulture! Yeah, he's a Knowallogist.

Knowallogist by Loanwolf February 6, 2014

Kookaburra

Kookaburra, can be confused with a species of bird that is native to Australia. It can also mean blow job, head job or felatio as the sounds of the kookaburra strongly resembles that of a woman vigorously performing felatio. .

Scored a wild kookaburra last night and couldn't help shooting my load down the back of her throat

Kookaburra by Sixamenos October 2, 2018