Skibidi - from a YouTube series made in source engine. Means "bad"
Sigma - alpha as in alpha male. Beta as in beta male. Sigma is a 3rd which means you follow neither alpha or beta but go your own way.
Rizz- short for "charisma"
Mewing - an act of contracting tongue /neck muscles to make your under chin area contract changing the shape of your jawline.
Gyatt - "god damn" - a big old butt.
Bet - "wanna bet?" Aka "yes"
Bussin - "busting" really good
Ohio - bad or mid "from Ohio"
Let him cook - let him do his thing. He's got this.
Baddie - hottie. Sexy.
It's the _ for me - pointing out the specific thing you enjoyed.
Oh that's that new "x"?! Tell me about it?!
Be excited people are joining your hobbies. Without people hobbies die.