Top Definition
A drink served at the smoothie chain Robeks Juice. Although it is technically a "milkshake" the 800Ib gorilla is really just a whole tun of peanut butter mixed with protein powder. It has been described as both "delicious" as well as "repulsive." The drink is supposedly named because it contains 800 calories however it is common knowledge that it really depends on what size you buy.
Sahn you trying to finish this 800 Ib gorilla for me? It was delicious earlier but now it's repulsive

nah I'm not doing that to myself its not like I'm trying to get big
by #consumeradvice June 10, 2012

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