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2. fun on a bun
Comes from a way of describing hot dogs on a bun. Hotdogs are pretty tasty and we all know eating tasty things are fun to do. Thus you get fun on a bun. Generally used as a compliment.
Example 1. This hot dog is fun on a bun!

Example 2. That mime is sure fun on a bun!
1. Fun on a bun
meaning its going to be super fun

it cant be boring

its like your eating fun
ilove it at her house its fun on a bun
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