Tronar el ejote (traw-NAHR el eh-HUT-eh) is a deep and colorful expression. It literally means "to snap the end of green bean." It means "to take a man's virginity." It's sort of the Chilango male version of popping an English-speaking woman's cherry.
Ricardo: Le acaban de tronar el ejote.
Jorge: Why is that dude so fucking happy?
Ricardo: Some girl took his virginity.