A word used to describe everything. Burd can either be a noun or a verb, and burdy is the adjective. It is a versatile word that is used to describe anything that has not word for.
It has similar uses to "derp". (ie, to derp around, a Derp. Derby...)
Person A: What do you want to do?
Person B: Let's have a party and invide those burds.
Person A: Sure, what should we do at the party?
Person B: I dunno, let's all just burd around for a few hours.
Person A: Wow, that's soo burdy.