2
Disbelief in sarcastic form.
(As commonly used on the show Grey's Anatomy)
Meredith: You didn't sign the divorce papers. Fine. I get it. End of discussion.
Derek: Oh... I usually just say "Meredith" and then you yell at me. I haven’t thought past that point. I actually didn’t have anything planned. Meredith hits him repeatedly with her purse
Derek: Listen! Hey stop it! Ow!
Meredith: Seriously? Seriously?!
by Laurdev September 15, 2007
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4
A lazy response of agreement to almost any statement. Takes the place of 'yeah', 'same', or 'mmm'.
Person 1: This lecture totally blows.

Person 2: Serously...

Person 1: Man, I am so hungover.

Person 2: Seriously...
by tillytat October 28, 2009
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5
An achievement in Gears of War, which the description 'Kill 10000 people in ranked match total'.

It never unlocks exactly on 10000, the player is mostly required to get around 13-15k kills.

The achievement can also be unlocked by glitching it, by using another account that has seriously.
1st Person: Yo I'm working towards getting the Seriously achievement man.
2nd Person: Haha, I can just glitch it.
by Rage man999 July 10, 2008
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6
the ULTIMATE achievement of xbox 360 that consumes the mind, body, and soul and makes the user go completely insane while trying to obtain the beast.
Dude hes got seriously!
Wow he must be good!

Dude hes got seriously!
Wow he must have no life!

Dude hes got seriously!
Wow he should totally get laid!
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7
replaces random as most annoying word in the world. it does not mean you're serious, and does not effectively emphasize what you just said. instead, secures you a position at the bottom of the social ladder.
A: the teacher doesn't know what she's doing.
B: i know. i really hate math. seriously.
(pause)
A: ok bye.
by wrbivrty August 26, 2008
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