Top Definition
Abbreviation for "In Real Life I Don't Know You", most commonly used in text messaging and sexting as an excuse not to give out personal information.
"Hey Billy! Send me dem n00ds!"
"No way! IRLIDKU!"
"You could know me if you wanted.."

"Billy, I'd love to come over tonight but my mom won't let me because IRLIDKU. She says you could be an internet predator."
by Madë Beautiful December 26, 2012

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