To kiss. I had a smack at her muns: I kissed her mouth. To smack calves skin; to kiss the book, i.e. to take an oath. The queer cuffin bid me smack calves skin, but I only bussed my thumb; the justice bid me kiss the book, but I only kissed my thumb.
SMACK
Meaning of SMACK in English
Slang English vocab. Английский сленговый словарь. 2012