To always act in one's own self-interest, fanning the flames for personal gain regardless of how it affects others. An egocentric person always arrima el ascua a su sardina without caring who gets left out in the cold.

A meddling person who sticks their nose into other people's business, the plural of 'metiche', very Mexican.

Finally understanding something much later than you should have, when it's already too late to react appropriately, often due to a lack of awareness or insight at the time.

To exhaust oneself mentally while trying to solve a problem, often without finding a solution. The burned-out person is no longer able to think clearly or find a way out.