From Germany. It stands for "Frauen, Lesben, Intersexuelle, Nicht-binär, Transgender and Agender". In English it means : Women(/Female), Lesbian, Intersex, Non-binary, Transgender and Agender. It's super useful to mean non-men, without saying as such, because it includes trans men who have a different experience to cis men.
Irish name derived from the "Salmon of Knowledge" an old Celtic mythological story. King Fin turns into a Salmon to escape his enemies amd eats the hazelnuts that drop from the tree of Knowledge into the river. By eating them he has ultimate Knowledge. Eventually he gets caught and cooked the cook (Fin again in a new life) burns his thumb on the cooked fish and sucks it. He then knows everything.
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.