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The definition of 'bes dum' can be applied to anything in this world that a person can form an opinion on.

Derived from lazy internet lingo and poor grammatic usage, 'bes dum' is a term that English teachers would frown upon.

Normal: "That was movie was just bad."
Usagee: "That movie bes dum."

Normal: "George Bush in an idiot."
Usagee: "George Bush bes dum."
by Fisherman's Friend March 29, 2003