The phrase ya te olvidé means I already forgot you in Spanish, and ctm is a common Latin American slang abbreviation used as a strong insult, especially in Chilean Spanish. Short clips built on blunt Spanish phrases like this circulate as reaction audios in chats, edits and soundboards because the meaning is clear even out of context. This one is used less as a song quote and more as a ready made comeback, shared when someone wants a harsh, funny and final sounding reply without recording their own voice.