to visit someone informally or without prior notice
visitar a alguien de manera informal o sin previo aviso (visitar a alguien de manera informal o sin previo aviso)
"Feel free to drop by anytime for a cup of tea."
"Siéntete libre de drop by en cualquier momento para una taza de té." (Siéntete libre de **drop by** en cualquier momento para una taza de té.)
to begin taking action toward a goal
to continue trying with faith and optimism
to impose strict security controls on something
to change from one job or career path to another
to move or progress in the direction of winning or success
to go past what you thought was possible