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.