A specific strategy for gaining mass in which one lifts weights regularly and consumes any and all types of food, specifically junk food.
Dude, did you just eat that entire cake?! I thought you were trying to get in shape?

It's OK bro, I'm doing a dirty bulk. Don't hate.
by Gainz4Life April 30, 2016
Get the Dirty Bulk mug.
Eating a medium dominoes pizza on a Sunday night to increase your weight for the rest of the week to lift more and gain more muscle mass
Garrett- Hey billy why the fuck did you eat a whole pizza by yourself?

Billy- I’m dirty bulking for the week bruh, you should try it sometime fat ass.
by Derogatory term April 9, 2019
Get the Dirty bulking mug.
Getting buff by eating Fifty Big Macs a day to fuel your metabolism.
He looked like he worked out a lot but it was just dirty bulking
by Somerandomitiot March 16, 2018
Get the dirty bulking mug.