What does having disposition of 护短 means? The context describe a character as having disposition of 护短. What does this means?

性格特点：护短！护短！护短！ 

I know that 护短 means to hide own's shortcoming. Does this describe a person who does not accept one's mistake? Shameless?
护短 is said 3 times, because it is important. 

It conveys something like, "Don't judge me, my friends or my family; Never blame me or criticize me; If I make a mistake, you must ignore it. Got it?"

(nod)

"OK, now you are my friend."