Multiple meanings: 1) A catchy, enjoyable song ("that track is a bop"). 2) Derogatory slang for someone (usually a young woman) considered promiscuous — equivalent to calling someone a slut. Originated from rapper Almighty Rexxo's "Lala Bop" (2021), spread via TikTok cyberbullying trends. Merriam-Webster flags it as offensive and misogynistic.