Its when you and three other friends order 1 of every item on the "Original" Taco Bell menu. Everyone in the group must eat at least one item from the menu. Only 4 people can take part in the challenge. You can share the food amongst the people in your group. Its up to the 4 people in the challenge who eats what.
Dude, I feeling like going to get a Mexican Roundup at Taco Bell.
I'm gunna have to take a huge shit after eating this Mexican Roundup.