vise sin sanne natur, stikke hestehoven fram betyr engelsk

show one's true colors▼(to reveal how one really is)
verb
[UK: ʃəʊ wʌnz truː ˈkʌ.lərz] [US: ˈʃoʊ wʌnz ˈtruː ˈkʌ.lərz]