Top Definition
A more awesome alternative to the word "pooping". It's got the soft "sh" sound. The harsh "ack" sound. And the "ing" that shows it's an action.

Best. Word. Ever.
Guy - "So dude, I was shwacking earlier and..."
by ben8790 April 02, 2011

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 act of showering, then masturbating.
After a Delicious Italian Dinner, I think I'm going to have myself a steamy session of Shwacking at home.
by Chassssjuam August 09, 2015

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