Top Definition
1 (v.) the act of taking a huge dump (sometimes refered to as a "Mason slam").
2 (n.) a giant pile of feces.
1. Stop at the next gas station, I have to take a monster slam.
2. The monster slam clogged the bathroom toilet.
by Mason Bonar February 07, 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
when two monsters procreate.
hey 'paul' im going to slam that monster bitch over there. The monster ambles over to the monster bitch 'oi'm going to slam you' ( he says it in a strange 'irish monster accent') The female monster drops on all fours in a submissive gesture. 'Slam me' she says
'hey nigel' says paul, that is classic example of a monster slam
by Neil O'Malley July 12, 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