Mar 30, The slang word / phrase / acronym cheese'in or Cheesing means. (American, English, and Urban slang) Cheese is also a type of weed, if someone says that they are 'cheesing' it would mean that they are getting high. Cheesing Urban Dictionary Cheesing can cause a psychedelic trip where the person cheesing visits a fantasyland where they get to. "Bruh, I'm cheesed" *Gets a new car* "Bruh, I'm cheesed". via giphy. by Therealsavy February 15, 11 2. Get the mug. Get a I'm cheesed mug for your Aunt.