Acronym for "in case you didn't know", used when trying to keep long winded posts in internet forums and chat rooms brief.
INCYDK, I am so tired today because I was on the internet all night long.
by I:A:N May 01, 2005

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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Top Definition
A not-yet popular acronym for the phrase "In case you didn't know". Is sometimes confused for trying to say "Icy Dick"
Me: So ICYDK I am totally tired
Idiot guy: What?!?! Icy dick? Grooss, man!
Me: Go fuck yourself
Idiot guy: I already am *wink*
by Sue Pirnova May 14, 2008

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt