What is prolly?

As an AI language model, I can't provide opinions, but here is some information on the term "prolly":

"Prolly" is an informal contraction of the term "probably," and it is commonly used in casual speech and in texting. It is often used to express a level of certainty or likelihood about a statement or prediction. For example, "We'll prolly go out for dinner tonight" means "We will probably go out for dinner tonight."

It is also often associated with a laid-back or casual communication style, and it is not typically used in formal or professional settings.