Top Definition
When a person goes of on a tangent and completely destroys the conversation or atmosphere.
You are having a nice evening down the pub and you are explaining to the assembled crowd of friends something exciting or retelling an old story and you wander off on a massive tangent which at the end has either offended, confused, alienated or stunned your friends into a silence as they contemplate your mental health. Or one of your friends does that.

That is Tangentacide. Often followed by people sneaking away from the table, needing the toilet or finding out their friends are in dire trouble and they must leave.
by matthaisz October 08, 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