1. 不修边幅 refers to not looking after one’s appearance. In addition to not dressing up, for a man this might include not shaving or combing his hair. For a woman this might involve not wearing makeup or doing her hair.

2. 马马虎虎 literally means “horse, horse, tiger, tiger”. The 长话短说 version of this story revolves around a careless painter, who one day painted a horse with a tiger’s head, and showed it to his children. This confused them, resulting in the older child being killed when he tried to ride a tiger, thinking it was a horse. The younger son later saw a horse and killed it with an arrow, thinking it was a tiger. The painter was then named 马虎先生 by the people, for his careless ways. The phrase sticks today although it can also be used as a reply to “How are you?” to mean “so so”.

3. Notice how 不负责任 is used as an adjective in 嗯，这样真的很浪费时间，也很不负责任.

4. 简单地说 has a similar meaning to 长话短说, as we see in 简单地说，跟他吵架的原因太多了.