What is the meaning of Fill_up?

To make (something) completely full.

To fill the tank of a vehicle with fuel.

To become completely full.

To become tearful as a result of strong emotion.

To annoy, or displease, by taunting, or by excessive nagging.

To satisfy the hunger of (someone).

To satisfy one's hunger; to stop being hungry.

To make a full house on the turn or the river.

To fill in / fill out a form etc.

To make complete, to bring to a full development.

Source: wiktionary.org