Your best bud. Your bud who will do anything with you, from sitting on the couchbeing a potato to climbing mountains. You never get tired of being with your spudbud.
An Idaho potato doll used for marketing little potato treats known as 'spudbuddies' often served like small baked potatoes. The doll it's self was known as a "Spud Buddy". Also known as a 'spuddy buddy'. Also, Jimmy Spudbuddy (a friend or 'buddy' to potatoes ('potato' in wrestling lingo is a hard punch or hit with an object)); former referee for the all midget professional wrestling federation the Micro Wrestling Federation got this name for being a hard or "stiff" hitter in his wrestling days.
For potatoes: "Did you eat all your spudbuddy's?" "Did you bring your Spud Buddy with you?" In wrestling: "Wow he just Spudbuddy'd the hell out of him with that steel chair"
That friend we all have, with whom a night of drinking and carousing ended with someone inserting a potato into their friends anus. May be lubricated or not. May be a homosexual or heterosexual experience, regardless of typical orientation. Usually spontaneous but may lead to recurrence.
After getting really drunk but striking outpicking up girls at the bar, Mike and John decided to make mashed potatoes. They were so horny they instead got naked and became spud buds.