Hmm? Back in my high school days I made some pretty atrocious protein shakes. The protein tasted like crap back then anyhow lol.
How about cheap egg protein powder, milk powder, tuna and raw eggs and some nesquik powder drink. YUM! That's the worst and 1 time only. I drank it all though. Damn near a quart in one sitting. BARF. ACtually I held it in, but man, that was the raunchiest of raunchy protein shakes and a definite nose plugger/mega fast downer.
Tuna, raw egg and brown rice sludge drink. Drinkable sorta. More like chew and drink at the same time. FIBER, mmmm.....YUCK.
Drinking cod liver oil. Um, can you say bitter cod liver oil face? Talk about rancid tasting!
Those are the worst. I won't go into the lesser myriad of gone wrong protein drinks.