Dirty Bulk 

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.

Dirty Bulk by Gainz4Life May 24, 2016

Dirty bulking

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.

Dirty bulking by Derogatory term April 8, 2019

dirty bulker 

An uneducated and improper way of gaining mass. This is done by eating extremely high fat and low protein foods (McDonald's, Ho-Hos, etc..) with little if any weight lifting. The would-be jabroni does gain mass - Yes, but it is almost entirely fat, defeats the purpose and is next to impossible to cut.

Ian: "Hey have you seen Leroy lately? He's been pounding those Twinkies and Big Macs. He said he's bulking up and trying to get diesel, but all he did was end up a fat ass."

Mike: "Yeah, I know. Dude needs to pick up an MD, you know - a Muscular Development (magazine)... He's such a dirty bulker. So un-diesel."

Both: Lol.

dirty bulker by Michael Davison December 27, 2007

dirty bulking

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

dirty bulking by Somerandomitiot March 16, 2018