When you go beast mode. Sometimes also referred to as obese mode.
"Shut the fuck up cause its time to go beast mode"
"Did you see conor going beast mode yesterday?"
Disappearing to actually work out in the gym while your whack buddies hang out on the elliptical.
I was in Beast Mode while gonzo and bravo were exercising with fat navy women.
When someone is being a bit dodgy going for under age quines
Look at that David Preston is talking to a 13 year old, he’s going full beast mode