What does ttt mean on instagram?

Hey there, could you help me out with something? I've been seeing this "ttt" abbreviation a lot on Instagram lately, and I'm really curious about what it stands for. I've tried googling it, but I'm not really sure if I'm getting the right answer. Could you explain it to me in simple terms? I'm really not up to date with all the latest slang and abbreviations on social media, so any help would be greatly appreciated!