Yo mama is so ugly that Bumble accused her of catfishing.
Bumble Catfishing Accusation
Explanation
Explain Bear
Okay, listen up, not-so-smart human. "Catfishing" means pretending to be someone else online, usually to trick people. This joke implies your mama is so incredibly ugly that the dating app, Bumble, thought she HAD to be faking her profile, 'cause no one could actually look like that! You, my friend, probably couldn't even get a match on Bumble even if you did catfish.