keen as beans is a describing word to call someone who wants you to buy them a gatorade bottle so they can smoke ket till they are blind
Person 1 "hi keen as beans here could you buy me a gatorade bottle so i can smoke ket till im blind"
person 2 "sure keen as beans"
A refried bean burrito, much like the normal bean burrito, is where the man gives anal sex to his partner, and then receives oral sex from a different partner.
Man, i gave Clara anal and then gave Sarah a refried bean burrito!