a Mc Chubble is the combination of a double burger and a chicken burger purchasable on the McDonalds dollar menu. The double burger is split down the middle with one meat patty on each bun. The chicken burger is then inserted in the middle thus creating a Mc Chubble.
Dan: what is that?
Taylor: Its the greatest burger at McDonalds for only two bucks!
Dan: whats it called?
Taylor: The Mc Chubble.