Snorlock is a slug that first appears in the episode "Slow Love." He was looking for a lady snail. He seeks the help of Finn and Jake to find a lady snail. When he tries to exit the house he rips off a chuck of the house, which resembles a snail shell in his back. He gets really nervous around girls and freaks out when they talk to him.
He is green and looks like a giant slug.
It's not mad juice! It's sad juice! I'm Snorlock, and I'm saaaaaaad. - "Slow Love"