A skin tag, or beauty mark that hangs off the skin resembling a punching bag. Derived from the sound the punching bag makes when it's struck. Pronounced: buh-duh-duh.
"His beduhduh grossed me out so much, that I made him get it surgically removed."
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!