A Spanglish slang term used to describe a face that has been shaved clean which for a long time (usually years) previous had worn facial hair, such as a mustache or goatee. The naked, newly shaved face gives the appearance of a bare ass
cheek.
Nalga is
Spanish for ass
cheek.
Daughter: What possessed
dad to shave his 'stache after 35 years?
Mother: He wanted to try something different, you
don't like it?
Daughter: No!! He has a nalga face, he needs to grow it back!