A soul-less individual whose only purpose in life is to play dirty tricks and pranks on unsuspecting victims. Little is known about him or his origins, other than the fact that he bears a resemblance to the dancing guy in the six flags commercials.
That one kinda fat and fuck ugly kid in your middle school ELA class who is the most hilarious mother fucker you've ever met and can do a perfect voice impression of everyone from Trump, to George Bush, to Edna from The Incredibles. The list goes on. He also manages to make the most boring things funny with his unrivalled charisma and 100% lack of the ability to feel shame. The Rickster is certainly one to be admired
"Holy shit Ian! The Rickster and his comrade, the Nickster made a rap about nouns and it's hilarious! (Also known as the world renowned rappers: Thug Monkey and Nicko Mode)
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.