What do you call a rapper who can't rhyme?
A rapscallion without the rap.
Rapscallion
Explanation
Explain Bear
Listen up, buttercup. This joke is playing on the words "rapscallion" and "rap." See, a "rapscallion" is a rascal, but if you take away the "rap" part, it's like a rapper who can't rap, get it? I know, it's a lot for you to handle.