a form of internet slang combining the words "yes" and "bestie," the latter of which is commonly used on stan twitter. it is to be used either as an encouragement or as an affirmative, typically in place of the phrase "yes bestie."
Getting yoshied is when someone takes advantage of someone else by pushing them down to achieve their goal. This is the same as when Mario ditches Yoshi to make a jump. Yoshi, the ever loyal steed and friend is dropped in a hole while Mario gets some extra height and distance.