When a group of friends/family are able to consistently share goods times, such as drinkingwhiskey and/or smoking a pipe, and are able to always, even when i doubt, get along. That my friend is what you call a cunbundle.
So say you are invited to small party by your friend. You go. When you get there is is obvious that everyone knows each other. As the night gets late you realize that you more of a fifth wheel so you make the comment "boy you guys are quite the cunbundle are'nt you?"
A cumbuddy is someone who will do anything to fill their mouth with cum. Every guy has a cumbuddy weather they know it or not and cumbuddies can vary from any point in your life and you can have more than one.
Guy 1: “Hey this girl is so clingy and she keeps doing things for me”
Guy 2: “Oh she must be your cumbuddy”