A person who slays noobs on popular video games such as Halo or Call of Duty. Often a casual gamer who kills a regualr playing nerd, referred to as a noob (Doug Marsh, Eddy Full, Fin Donaldson,Pickled Bums). The title of noobslayer is one that has been fought over for many generations.
Noobslayer: Ha, I owned you you stupid noob
Noob: Stop killing me it's unfair.
Noobslayer: I AM TEH NOOBSLAYER
In the old times if you disobayed orders in the army you had your arms tied behind yor back and a giant kaneing with your pants down on your penis, there fore nobslap
"Running away from my battle son that calls 4 a good old nobslap"
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.