1) Characterized as the act of displaying extreme excitement for something that is yet to happen.
2) Being really nice to someone you love by supporting something they wish to do before they do it.
3) The opposite of not loving someone because of a lack of recent quantifiable accomplishments.
person 1: I'm so excited! You are going to do great!!
person 2: Thank you for your support, I love it when you prematurely ecstaticculate! It makes me feel so great!