An informal term referring to someone who is arrogant or overly confident.

A colloquial expression referring to someone who is intelligent or knowledgeable.

बुद्धिमान

English Usage: She always has the right answers; she's got a big head.

Hindi Usage: उसे हमेशा सही जवाब मिलते हैं; वह बहुत बुद्धिमान है।

To boast or brag about one's achievements.

To exaggerate confidence or ability.

अधिक आत्मविश्वासी होना

English Usage: Don’t big head too much; stay grounded.

Hindi Usage: बहुत अधिक आत्मविश्वासी मत बनो; वास्तविक बने रहो।