This Spanish slang is used when someone is acting arrogant or overly proud because of some success or achievement. It is akin to the English phrase 'getting too big for one's boots'.
Examples
- Spanish: Desde que ganó la lotería, se le subieron los humos a la cabeza y ya no habla con sus viejos amigos.
- English: Since he won the lottery, he's been getting too big for his boots and no longer talks to his old friends.