Is it against the rules to reveal your hand after flopping the nuts?

[questions]

That is if 1) your table image is clean; and 2) you flop the nut straight or flush, where you think someone else has flopped top set, and you are the top two chip leaders at the table, how do you get them off that set? Can you just tell them on a flop of 9, 8, 6 rainbow that you have T,7, arguing that you have them beat and they need more cards to beat you? And then you push all-in?