2. Someone who needs to wash their face: pimple grease, food, dry skin flakes, boogers, eye boogers, etc. have gathered on the surface of the persons skin
3. Someone who you think has no brain and instead has a head full of bubbles
"Ew, that Whitney girl needs to wash her face. What a soaphead loser..."
"His name is ZEVIN??? What kind of soaphead would name they're kid something that awful?"
(Not to be confused with soapface, which is someone who cries when they soap in their eyes.)