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To overtly use proper grammar, really long sentences, and pompishness in day to day life.
Brian: "Hey dude let's smoke a blunt"

Onder: "I do think that is such a terrible idea, and thus, we should not do such a thing. But should you wish to do so, you do understand that you would be breaking the law and have a chance of being imprisoned? I beseech you to not smoke such cannabis in my face"

Brian: "wtf dude why are you so onder?"

Onder: "I am deeply offended at your usage of such profane language. Please abstain from asking me with such brash and terrible manner."
Onder by 1010102 April 19, 2010
Related Words

owndering 

- being pro at computer games
- owning noobs at wc or cod
- listenin to music that isnt emo
- drinking pepsi, gatorade, or water. (nothing else allowed!)
- being black but acting white
- thinking bout a girl called alyssa, liz, nicole, or emily (no one else allowed!) These aren't friends, these are names of girls you think of when you are owndering
- pretending to write an english project but actually talkin to ur friend
If you are playing Call of Duty 4: Modern Warfare on XBOX 360 or PlayStation 3, you will be crushing noobs with a massively massive positive kill - to - death ratio.
If you are supposed to be doing something for school specifically for an English Class and you decide to Chat with friends, then you are owndering.
If you play Warcraft III not World of Warcraft and you have forgotten how to lose a game, because you have constantly won games. Then you are Owndering.
owndering by Mo Mommamama March 16, 2008

Onderdonk 

When you dress up like a historical figure and fuck someone in the ass.
Did you see my George Washington costume? I’m going to onderdonk the shit out of her tonight.
Onderdonk by migglez June 7, 2018

ondemanding 

Verb. Meaning to watch tv that has been missed using the on demand functions of my cable box.

Noun. A group of tv shows that are saved on the on demand functions of my cable box
Verb. I am too busy to go out, I am ondemanding all day.

Noun. What do you want to watch on tv? Ondemanding.
ondemanding by Driller 36 March 19, 2011

Ownderful 

When someone says lots of wonderful things about themself, then that person is "ownderful".
Usually refers to people who shamelessly advertise their ego, or are constantly showing everyone how badass they think they are.

Commonly appears as a misspelling of wonderful rather than the actual term, because people with such self-magnificence syndrome are few and far between.
-"Did he really just say that he's the smartest person in the building and everyone else is idiots? Lol, the audacity."
-"Yeah, he is ownderful to the max."
Ownderful by Galbatrollix November 5, 2020
Bien loco, Grifo, accelerado, drogado para hablar claro
Ayer fui con un amigo para visitar, y lo note Bien Ondeado. Dice que estaba pisteando y fumando todo el dia.
ondeado by Big_K_619 August 27, 2022