heartface

From heart +‎ face.

heartface (plural heartfaces)

1. (Polari) A term of endearment.
   • 1967, Barry Took, Marty Feldman, “Gaslight Son of Flicker”, in Round the Horne, spoken by Sandy (Kenneth Williams):

     You may have vada'd one of our tiny bijou masterpiecettes, heartface.

• See Thesaurus:sweetheart