The document defines 20 English idioms and phrases, providing the meaning and an example sentence for each one. Some of the idioms explained include "catch up on" meaning to do work you missed, "dropped out" meaning quitting a course, and "meet up with" meaning to meet with someone or a group. Other idioms defined are "fall behind", "make up", "put off", "kicked out", "read up on", "read over", "study under", "kick off", "go for", "knock out", "work out", "work off", "cool down", "join in", "twenty four seven", "get the ball rolling", and "sleep on it".