"n: "dang, what's up with our roommate?" a: "he's lost his marbles, he's become a cankle protector
a boyfriend, usually a possessive jealous jerk, who stops all men from glancing at his overweight girlfriend (especially her fat exposed ankle) because he thinks she's actually gorgeous
""n: "dang, what's up with our roommate?" a: "he's lost his marbles, he's become a cankle protector" What is the definition of "cankle protector"?