ttt originated from Snoop Doggy Dogg. He used to have a pronounced stutter so he would say, "Fo shizzle my t-t-t-tizzle". The ttt became short for the whole phrase.
Well... that certainly cleared things up?! What is "shizzle"ing? what is a Tizzle? They sound Yiddish, Oy Vey! This reminds me of the time I looked up the word "pithy" in the dictionary: pithy pi-the: "tersely cogent"
is what it means---it sends a thread that has slipped down(maybe to another page) and puts it to the top of page 1---hence--to the top(of the list)---clear now