Tufbrew

Tufbrew is a cut perk-a-cola that was going to appear in Ascension. The only proof that it exists are in the character sound files with 'perk_tufbrew' in the name. Dempsey's sound file is the only one that mentions the perk by name. One possible theory for this perk's function is that it reduced player flinching when hit, similar to Hardened Pro. Other theories include that it let the player rip through a horde of zombies when he/she gets surrounded.. Yet another theory is that it prevented grenade damage, similar to Flak Jacket. This is likely as if this perk and Pronaide are combined the effects are similar to PhD Flopper. The "brew" ending suggests its some kind of beer-based drink

The character quotes can be heard here