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 11, 2008
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The trait of being too serious for your own good.
Relax buddy, you've got way too much seriousity.

Seriousity killed the cat, and by cat I mean you.
by Isakilla April 26, 2007
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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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When someone doesn't believe how serious you are.
Hym "No, seriously. You have to at least acknowledge (internally at least) that the the situation is extreme. From Gangstalking, to almost jail, to retard sex cult, to publicly robbed by a millionaire², to gaslit by a psychologist. It never ends. It never ends! I'm going to got hunting and the deer is going to hunt me! The next time I go to eat my food is going to eat me. And to have you all sit there and wonder why anyone would behave immorally. 'No. You should have to do all that AND behave morally' as you snicker to yourself before you revel in the irony of the situation and your contempt of me. Revel in my sweet, silent suffering in your hellraiser suffering cult because that's what feeds your reality monster. Suffering is sacrosanct, after all. And now I hang. My grip loosening on the edge of the bottom rung. The people above me, on the edge? Staring down blankly and pissing."
by Hym Iam August 25, 2022
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1- to mean something with intent

2- Homestarrunners' SAying, also on bumber sticker, i really reccomend you check out the Strongbad Sings though (now has a great discount price!)
1- ''put it back, stoopid kris!''

2- Seriously, guys.
by BObo D. HObo July 30, 2004
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A verb -

To seriousize

Present tense:

I am seriousizing
You are seriousizing
He/She/It is seriousizing
We are seriousizing
You are seriousizing
They are seriousizing

Past Tense:

I serious'd
You serious'd
He/She/It serious'd
We serious'd
You serious'd
They serious'd

It is what you do when you need to look serious. You serious.
"Jim was laughing, but then he serious'd because his mum came in."

"Could you guys seriousize a bit?"

"Yo dawg, us street-ghettoistics be seriousizing!"

"To seriousize. Or not to seriousize. That is the question."
by Yonasu June 28, 2008
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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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