The phrase comes from Diego Maradona's angry press conference in October 2009, after Argentina qualified for the 2010 World Cup. Annoyed by months of criticism, he told journalists they could keep sucking it and singled out one reporter with vos tambien, la tenes adentro. Argentine fans shortened that insult to LTA and it spread through football forums, banners and chats as a universal taunt for defeated rivals. The clipped vos tambien version survives because it works outside football too, as a quick audio shorthand for gloating.