http://www.stewielive.com/
Type in commmands, watch Stewie react. Check out "death", "berate meg", "brocoli", "dance", "take over the world", "kill lois", "touch yourself" (hee!) and "poop your diaper".
If you give it enough things that it recognizes, the "kill" lever moves up until the "Kill" button starts glowing. Press it.