kisser
n. countable C1 Advanced US //ˈkɪsɝ// UK //kˈɪsɐ// kiss·er
n. a person's face, especially their mouth and nose. It is a very casual and slightly rude word for someone's face.
n. a person's face, specifically the area including the mouth and nose. Highly informal and often considered vulgar; typically used in the phrase 'give someone a kiss on the kisser'.
He gave her a kiss on the kisser before leaving.
The child was so dirty that his entire kisser was covered in mud after playing in the garden.
While the phrase is technically a double entendre, using 'kisser' in a professional setting would likely be perceived as unprofessional or even offensive.
Agent noun of kiss: from kiss + -er.