Top Definition
You disapprove of something someone said, automatically making them a "Giller".
This word usually lets the other person know where you stand with their suggestion / comment / plan.
Usually used after the companion says the offending sentence but in enxtreme cases you may interuppt and say loudly and proudly "Giller"
You may also optionally add either "Thriller" or "Killer" to further add to the situation.
Situation 1

Person A: I think you should lend me a ciggerette.
Person B: No i always lend you them, you never have any
Person A: Come on i always give you them back.
Person B: Oh for god sake your a giller

Situation 2

Person A: I'm going to mess around with your sis....
Person B: YOU GILLER KILLER / YOU GILLER THRILLER
Person A: ...tem
by Cainzor October 03, 2006

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