Suddenly becoming obsessed about a singlepiece of work, a series, or a narrow area of pop culture. Similar to geeking out, though can be used to describe becoming obsessed with non-geeky things.
Nora is constantly spouting crazy theories about Inception. She's gone completely okapishit for it!
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.