An offensive term telling people that they have bad acne

the whale tail is the shape formed when a g-string rides up high over a womans trousers

A person with alot of acne on their face

A pizza face is either someone or their face that is so covered in acne (pimples/zits), that the skin beneath is hard to make out.

A face that is so covered in acne the skin underneath cannot be seen.

When your acne is so bad that your face looks like a pizza

A person with really bad acne resulting in a red greasy face... Just like pizza!