The document provides definitions and examples for common English phrasal verbs. It defines "act up" to mean misbehave (for people) or not work properly (for machines). It also defines "add up" to mean logically fit together or find the total, "ask out" to mean ask for a date, and "back down/off" to mean not follow a threat. In total, over 50 common phrasal verbs are defined and examples are provided to illustrate their meanings.