Top Definition
To be at the apogee of the sexual act; to be fully inserted into one's partner. Said to be from the data plate found on the sides of various pieces of hydraulic drilling equipment. To be up to your nuts in guts, to bottom out.
Chuck was up to the maker's mark in Cindy last night - that must explain why she's walking funny today. - Sol R.
by Pontius Pilate August 15, 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