(1) adv - "seriously?", expressing doubt/surprise or asking for confirmation
(2) exclamation/statement issuing confirmation
(3) agreement
(1) yo girl is preggers with triplets?! for serious?!
(2) for serious, that chick wants my ass!
(3) "that teacher is dumb ass hell."
"for serious, man."
by je adore dior March 9, 2003
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a combination of the phrases "for real" and "seriously", "for serious" can express agreement when used as an exclamation, it can also be phrased as a question.
Example 1:
person A: "Hey, I got a new cell phone today"
person B: "For serious?"
Example 2:
person A: "That girl is such a ditz"
person B: "for serious!"
by Jon Pan September 10, 2005
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Be serious is a derivitive of the phrase "what the heck is your problem, you're pretty dumb".
"Dude, why are you eating my chips, Be Serious"
by El Presidente May 24, 2004
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a mix of for real? and are you serious?

u can add LY to serious if needed~
ll: we have homework tonite
kk: "are u for serious?"
by Anonymous March 14, 2003
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It's just like fo' real, but it sounds funnier and sometimes doesn't make sense to people the first time they hear it. Sure to make people laugh.
Bob: Did you know Britney Spears got fat?
Janet: For serious? She used to have such great abs.
Bob: For serious.
by Joseph Eckersen September 22, 2007
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1. Wanting to be with someone without commitment.

2. they don’t really want you
He said it’s not serious, so ya know.

Nah bro it’s not even serious
by Medium_biscuit January 8, 2019
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When the coach said they would have to do 100 push-ups they all replied, "are you for-serious
by jd April 11, 2005
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