Red Bull Cola. In spite of the fact that I genuinely like the taste of Red Bull, this stuff is so nasty I couldn't finish more than half a can.
Also, I've never tried it myself, but I hear that a brand of schnapps called 99 Bananas is downright awful.
Also, I've never tried it myself, but I hear that a brand of schnapps called 99 Bananas is downright awful.