Meaning the "coolest", "dopest", "sickest" to exist. a way of describing how amazing something is or was.
It also can be used sarcastically to describe something unfortunate or funny
"Oh my god that party last night was the sickest ever"
"Wow, I love your outfit...sickest ever"
Sarcastic Use: "I got a 60 on my test, sickest. ever."
A term used to describe a mekbourne sick bitch who hooks up a lad good and than becomes known as 'sickest bitch ever'
Ren ran into Mems on his way to buy paint and Ren said "I have a bag of paint in my backpack you can have." Mems replied "sickest bitch ever..."