Sentence:  “... the awfully hearty sort of Christmas cards that people do send to other people that they don't know at all well. You know. The kind that have mottoes like/   Here's <WSD>rattling</WSD> good luck and roaring good cheer, / With lashings of food and great hogsheads of beer. ...” 
Meaning of the word marked with <WSD> tags:  good, fine.