A term used for somebody who is quite intoxicated, typically with beverages such as Greene King IPA. Used by Alexander Robertson in the group UK Simpsons II, when asking for Simpsons episodes. Although roasted for his post originally, he then became internet famous thanks to the group and in other social media after featuring in a BuzzFeed post.
Eric: Man, we're quite drunk, aren't we?
Nick: Nah mate, we've been on the IPA lad. That means that we're in fact absolutely wasted!