"On its face" means apparently, superficially, at first glance, or as far as can be seen. It means what can be determined from an examination of the obvious external signs, without a thorough or detailed examination. Thus your expression means "apparently complete"
poo on your face
YES!!! he is a complete dick to me and shoves my face into yellow snow!!!!! i hate him Keep posting your thoughts about oumboon!
An about-face is an abrupt turn to face in the opposite direction, or a complete reversal of attitude, opinion or direction.
Get a brawnd face
"Face" in Spanish can be translated as "cara" or "rostro", depending on the context.
Your question is not complete. You need to tell us in your question what exactly you are talking about. The face of what? Where?
a clean face
sea turtles face many dangers
It is slang for 'hit you in the face'
it means face to face
attractive in the face
you should shove poo in your face