Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
smacker [ˈsmækər] n (inf)(kiss) поцелу́й; (:BRIT) (pound note) бума́жный фунт; (:US) (dollar bill) бума́жный до́ллар
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.