Synonym: wine and meat friends.

Wine and meat friends jiǔròu péngyǒu: refers to those who can eat and drink together, but often do not have ideals, morals, and cannot **** in trouble, and are often unreliable and have a bad reputation.

Why can a friend be called a dog?

According to legend

The black man was so happy that he patted Liu Bang on the shoulder and said, "My friend, thanks for eating my dog meat, this dog meat counts as my treat!" When Liu Bang heard this, it was just what he wanted, Liu asked the black man, "Friend who sells dog meat, who are you?" "My name is Fan Kuai!" From then on, the two became good friends, and Liu Bang stayed at Fan Kuai's place to eat and drink for free.

After a long time, Fan Kuai got a bit upset and thought, "Liu Bang's brother does nothing but eat and drink for free, tomorrow I will go to the other side of the Surabaya River to sell it, let's see what he will do." The next day, Fan Kuai got up early in the morning and quietly left, picking up the hot dog meat.

When Liu Bang woke up, he was missing Fan Kuai, and hurriedly asked his neighbors, only to find out that Fan Kuai had gone to the other side of the river to sell dog meat, so he couldn't wait to get to the other side of the river. Strange to say, without Liu Bang, Fan Kuai's meat really could not be sold; Liu Bang opened his mouth and chewed it, and the dog meat was sold out in a while.

After that, Liu Bang ate the dog meat every day, and Fan Kuai's business prospered day by day. Later on, Liu Bang cut down the snake and rebelled against the tyrannical Qin Dynasty, and Fan Kuai followed him to join the rebel army, and became one of his powerful generals. In the Hongmen Banquet, it was Fan Kuai who saved Liu Bang's life!

Slowly, this story spread, and the saying "dog meat friend" became a household word, but with the change of time, this saying has taken on some derogatory colors

The story of "dog meat friend" has become a household word.