Often used to mock someone who lacks variety in their hobbies or interests.

Slightly Rude

Can be sarcastic, implying the person thinks their life is better or more exciting.

Sarcasm Alert

It doesn't mean to literally get a new life, but to seek new experiences.

Used when someone's behavior is seen as immature or irresponsible for their age.

Sometimes used humorously among close friends or family.

May be advice to someone who is overly obsessed with something trivial.