A Tony Danza on Halo live is an assassination by way of punching a player in the back of their head. This is an instant death for the opposite player. When one gets a "tony danza" you must yell "Tony Danza!!!" over the microphone. Otherwise it will only be an assassination. This term comes directly from the original definition of a tony danza...
When you are giving it to a chick from behind, you yell out "Who's the boss?" She'll get confused, turn her head around, at this moment, you donkey punch
her and then scream TONY DANZA!!!