Top Definition
That part of the exhaust manifold system, on older vehicles, known as the heat riser and necessary to aid in fuel evaporation and make the transition from cold to hot idle engine operation efficiently.
The first cold day I cranked the old buggy over it was obvious the frabulator valve was rusted and frozen up as she wouldn't run right and carb touch-up adjustments made no difference.
by Robert 'Bob' Weiss November 23, 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