Imam An Nawawi mentions in Al Athkaar
“From the dispraise worthy words which are used in the customs is his statement to the one he is arguing with:
Oh Donkey, Oh Billy Goat, Oh Dog, and similar to that.
This is repulsive from two angles 
One that it is a lie 
And the other that it is causing harm 
Page 390 
Majid Jawed Al Afghanee