A know-it-all — someone who pretends to have expert knowledge on everything and constantly interrupts others to correct them. Insufferable in any conversation, especially in meetings.

To be completely in one's element — in the exact environment where you naturally thrive. The person who is en su salsa shines effortlessly, visibly, and with unmistakable joy.

In Mexico, to be very unfaithful or disloyal — to betray or mistreat someone who trusted you completely. Being perro means acting in a sneaky, backstabbing way toward those closest to you.

To make amends with someone after a conflict or disagreement, and to restore a relationship.