Foolish behaviors.
v.1 Strong drink. It is unwise to be lead astray by too much strong drink (wine, beer, etc.). Too much alcohol clouds judgment and leads to foolish actions and words (and possibly addiction).
v.2 Angry people. The king’s anger is like a roaring lion (imminent danger), whoever provokes him to anger forfeits his life. One would do well to stay away from angry people.
v.3 Quarreling. It is an honor for a man to keep away from strife, but the fool is always quarreling (see 14:29). The honorable (humble) man practices conflict avoidance, it is foolish (caused by pride) to be quick to quarrel.
v.4 The sluggard. The sluggard does not plow in season and at harvest he will have no food (see 21:25-26). He wants a share of the income but will not put forth the effort.

Read Proverbs 20:1-4