- forget oneself; become delirious with joy; forget everything in one's joy; get a swelled head; (They) grow so swellheaded and conceited that (they) simply forget themselves.; have one's head in the clouds; lose all bearings in moment of pride and satisfaction; make sb. swellheaded; one's head has been turned (by...); turn one's head:
be carried away by a sudden impulse; lose one's head in a moment of excitement;
心血来潮,忘乎所以
One mustn't be carried away by one's successes.
在胜利面前不要忘乎所以。