A strategy used to build bodily mass, in which one holds in his/her feces in to increase the productivity from a workout. The goal of shitmaxxing is to hold your feces in until you're at least finished with your workout. The longer one holds his/her shit in, the larger the gains. The basic theory behind shitmaxxing is that the uncomfortable feeling caused by holding your feces in incites a flight or fight reaction, leading to an increase in testosterone and adrenaline production. This in turn leads to more reps, more sets, longer sessions and more gains.
by JTdem October 15, 2021

The act of pooping as hard as possible, normally performed when constipated.
Opposite of clenchmaxxing.
Opposite of clenchmaxxing.
by EpokGamer69 June 01, 2024

The action of holding in a massive shit for a prolonged period of time. Synonymous with clinchmaxing, but must be done whilst a shit is in the rectum.
Bill:
“Bro, Logan is an absolute legend at Shitmaxing! One time he didn’t shit for a whole month!”
John: “Wow, what a sigma!”
“Bro, Logan is an absolute legend at Shitmaxing! One time he didn’t shit for a whole month!”
John: “Wow, what a sigma!”
by 5555555577777777777skibidi April 22, 2024
