Top Definition
1) When A Girl/Guy uses their grandmother to avoid any potential romantic advances

2)When a conversation between someone and a potential date is interupted by either of the people's grandmother
1::
Kenny: Dude i was gonna go talk to this hot girl but then she grabbed her grandmother

Orlando: Dude major grandma

2::
Mike: I was totally about to get laid but then my grandma pulled up and gave me clean underwear

Shanon: That's grandma cockblock if ii ever heard of it
by Shapreston July 21, 2010

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