The 'LeBron Rapping' or 'LeDontKnowTheLyrics' meme stems from several videos of NBA superstar LeBron James vibing to hip-hop tracks on his social media stories. Fans quickly noticed that LeBron often mumbles or makes up words when the lyrics get too fast or complex, leading to widespread mockery and affection. The 'Yabadabadoo Old Navy' variation gained massive traction on TikTok, where users dubbed over his videos with nonsensical, rhyming gibberish to highlight his 'unc' energy. It’s a staple meme for describing anyone who acts like they know a song perfectly while actually winging every single word.