Standing elevated on the tips of one's toes.
Moving carefully, quietly, warily or stealthily on the tips of one's toes.
We crept out on tiptoe so as not to awake the children.
Hebe was also assigned several lines of dialogue after No. 18 ("Carefully on tiptoe stealing") and again after No. 19 ("Farewell, my own"). Source: Internet
He played right back to the bouncers, standing on tiptoe, and played them with a dead bat, sometimes playing the ball one handed for more control. Source: Internet
Louise becomes concerned when Scott points out that she no longer needs to stand on tiptoe to kiss him. Source: Internet