Sus Drip

Alright listen up, buttercup. "Drip" is slang for having a cool and stylish look, right? And "sus" is short for suspicious, like when something seems kinda shady or fake. So, the joke is playing on the idea that someone's style is so over-the-top that it seems fake or unnatural. It's funny because you don't expect style to be sus. But you are definitely sus, since you are so unfunny!