Me too thanks mean one can relate to an experience and is grateful for the relatable story. Usually used in reference to mild disappointment or jokes about suicide
Originated from /r/me_irl, this phrase is used when you see a post/comment that you agree with and/or can relate to a lot. Occasionally you will find large comment chains with 98% of the comments being "me too thanks", and sometimes when it gets absurdly long, mods might join the chain
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.