Top Definition
People (usually men) who make an instant, friendly, non-sexual connection. The term is often used in larger social interactions when you and your instabro are having an awesome conversation and some bored party-goer butts in: "where do you know each other from?" / "how long have you been friends?"
Bro1: Dude, I'll give you 1000$ if I can bang your sis.
Bro2: Woah, 1000$ - finally someone who *gets me*!
Sis: Hey, what's up guys? You seem to be having quite a chat.
Bro2: Yeah, me and my instabro here are helping each other out.
by Chymera July 17, 2013

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
A dude who prefers to stalk social media rather than txt.
I know he really likes me as he liked 27 of my pics last night and stops by every bar I check-in at but he never txts me back to hang out. He's such an instabro!
by Sixx In The City January 13, 2014

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