Definition of stupor for English Language Learners. : a condition in which someone is not able to think normally because of being drunk, drugged, tired, etc.
It stands for India Pale Ale. IPA is a version of Pale Ale, which is beer brewed with pale colored malt, and typically more hops for a sharp, clean bitter taste.
It doesn't stand for anything-the E is an extension of the first word of the SEAL acronym (SEa, Air, Land).