Sherked, alternatively spelled "sherkt" is a misspelling of "shrekt" or "shreked". The misspelling shows the urgency and so getting Sherked is much worse than Shrekt.
1. Oh man, I'm gonna proper Sherked by my wife tonight, I lost all my money at the casino.
2. Bob's gonna get Sherked tonight if he doesn't turn up and give me his XBOX!
The shermwave can be traced back to the term sherm which originally was a cigarettedipped in PCP or embalming fluid. Being "shermed out" was the effect the drugs had. Eventually being "shermed out" came to be used as a term for being fucked up in general and "shermed" along with 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.