When someone uses too many exclamation points in a paragraph, or uses unnecessary exclamation points, and you want them to explain why the need for all the excitement.
Common side effect: Topic ADHD
Jenny: Hey! I went to the mall today! Puppies are funny! Want to see a movie! I'm eating pretzels!
Rachel: Uh, explanation point....
Jenny: I drank 9 Red Bulls
(other typical answers include: I'm drunk
/just met my dream guy