a shot of life
A person who is like a bag of chips, full of flavor, mess, and sometimes a little bit of regret. They might not be the best looking, but they are full of life, energy, and the occasional swear word that makes you want to run away.
My neighbor started a dance party in the parking lot. That was a shot of life.
My mom yelled at the internet for not working. That was a shot of life.
My cat tried to eat my laptop. That was a shot of life.