Being cheval, mean that a person or a situation made you upset about something particular.
If humans will be more animals, your reaction will be automatically the same as a Horse who do noise with his mouth (squeal).
"Squeal - The horse usually squeals with its mouth closed. A squeal varies in length and loudness depending on the intensity of the situation. Often you hear a mare squeal when she did not like something that is happening or is being courted by a male."
- Hey Helena, how are you today ?
- Yeah all good, just this guys think he can be my friend when I'm saying to him that we are not on the same page.
This make me cheval bruv !
- Say less, being cheval is not good, I got you...