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Crayfish means crazy or mad.

That party was so crayfish!
Damn...what a crayfish class.
Did you see that new kid? He is totally crayfish!
Ahhh! This is driving me crayfish!

What? This is Crayfish!
Crayfish?!-No, this is SPARTA!
by leetlemming March 10, 2009
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A synonym for "crazy". An elongated form of "cray-cray", which is short for crazy. Used when someone or something is just so wacky you can't handle it.
God, that Lila is so crayfish!
Dude, that's completely crayfish...how embarrassing!
by Awkotacocrayfish December 06, 2011
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An undesirable person who has the attributes of being cray cray or crazy.
Don't hang out with her, she's a crayfish.

There are crayfish everywhere on Black Friday.
by annietiger May 14, 2009
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noun or adjective
someone or something that is absolutely crazy
Did you see her on the dance floor last night? She was dancing like a crayfish!

That party last night was crayfish!
by misocrayfish April 24, 2011
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Crayfish are a very diverse group of crustaceans. They resemble small lobsters. Crayfish are native to every continent but Antarctica and the Arctic. They usually reach an average length of 3-9 inches in length. Some genus of crayfish stay under 2 inches. The LARGEST species of crayfish is the Tasmanian Giant Freshwater Crayfish can weigh up to 2-6 pounds and reach a length of 31 inches. Crayfish eat pretty much anything. Algae, dead & live fish, water plants, etc. Crayfish usually have an average lifespan of 3-8 years. Crayfish can reach adulthood in just 3-4 months. Crayfish tend to be quite aggressive. When a predator attacks a crayfish, the crayfish will rear up with it's 2 pincers raised and attack the opponent until it finds somewhere to hide (Unless the crayfish just shoots backwards into safety). Despite this, people keep crayfish as a pet.
There are many different genus of Crayfish.

-Procambarus
- Cambarus
- Orconectes

- Astacus

- Cherax
- Euastacus

- Austropotamobius

- Engaeus
- Pacifastacus
- Cambarellus
- Fallicambarus
- Paranephrops
- Cambaroides
- Tenuibranchiurus
- Astacoides
- Engaewa
- Faxonella
- Barbicambarus
- Virilastacus
- Hobbseus
- Bouchardina
- Astacopsis
by AllosaurusFragilis June 15, 2018
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Not an animal, a crayfish is in fact a fruit, often mistaken for a vegetable.
The trees were teaming with crayfish. It would be a bountiful this year!
by Bob Buttons July 07, 2004
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