To degenerate cognitively, to be in the process of having a mental breakdown, the process of going crazy
Jeff: I can't believe what my pops says sometimes. It's like he's incapable of higher thought!
Julian: Yeah, I'd say your pops is going off the deep end LOL!
Julian: Yeah, I'd say your pops is going off the deep end LOL!
by paynasty23 September 12, 2010
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Going Off The Deep End • going off the stick • You’re going to spin off the face of the earth. • We're going back in time to the first thanksgiving to get turkeys off the menu • going off-menu • going off topic • Going off for a Crilly • Going off it's nut • going off lean • going off like a frog in a sock