Tongue Tied

Ship-issue milkshake and toffee crispy bar
("Bodyswap", Series III)

The Brefewino version

Crispy bars are a toffee-based crispy confectionery in the Red Dwarf universe.

Crispy bars could be purchased from the vending machines of the JMC mining spaceship Red Dwarf.

When a skutter went berserk and rewired the entire ship, Dave Lister accidentally activated the Self-Destruct System by ordering a crispy bar and a milkshake. ("Bodyswap", Series III)

The Brefewino word for "catkind" was "four-legged, crispy bar snacks". ("Identity Within", Series VII)

They may be related to the breakfast cereal Krispies.