or Christmassing, subs. and verbal subs. (colloquial).Holly and mistletoe.
1836. DICKENS, Pickwick Papers, p. 228 (ed. 1857). The fat boy pointed to the destination of the pies. Wery good, said Sam, stick a bit o CHRISTMAS in em.
1851. H. MAYHEW, London Labour and the London Poor, vol. I., p. 141. In London a large trade is carried on in CHRISTMASING, or in the sale of holly and mistletoe for Christmas sports and decorations . Look, said a gardener to me, whats spent on a CHRISTMASING the churches!