Say "traffic," and replace "r" with "h." It sounds like... that thicc.
Traffic Pronunciation
Categories
Explanation
Experiment
Explain Bear
Listen up, buttercup. The joke plays on the similar sound between "traffic" with an "h" replacing the "r" (resulting in "thাফিক") and the slang term "thicc," which is used to describe someone with a curvy or full figure. So the joke is funny because of the phonetic similarity and the unexpected connection to a popular slang term. You probably still don't get it and that is why your mom dresses you funny.