GLEIVAN! 

The catchphrase of the Professuer/Scientist off the simpsons.

Professuer/Scientist"Are you sure you don't want a ride on my air motocycle?"
Bart-"No"
Professuer/Scientist-"Ok *pulls away sharply* GLEIVAN!"

GLEIVAN! by GirlSkater February 23, 2004

gleiven 

a word/noise, produced when a nerd is behaving in an excited manner

so i ordered the newest star wars and warhammer games they are the coolest ever and the shooting and the dying and the gleeeeeiiiven!

gleiven by thats sum funny shit September 11, 2003

Glevan 

Gluten free vegan.

Says to waiter: is there anything glevan on the menu?

Waiter: what’s glevan?

Person: I’m a gluten free vegan.

Waiter: no body can help you here or anywhere

Glevan by Drk075 June 20, 2018