-ing

Mr. Tulip's favourite syllable. This conveys a lot of very specific meaning in one small space, as in the discussion of an antique virginal:

So called because it was an instrument for –ing young ladies!
My word, was it? I thought it was just a sort of early piano!

It also has its uses in polite discourse when one does not want to have to completely spell it out.

Sacharissa Cripslock knows all about "-ing". Apparently her old teacher resorted to it a lot, but approached the phenomena from the opposite angle; she was a nun who wanted to convey the impresssion without committing the sin of using any actual words.

Reference Love In A Canoe Coffee and Sna-Fu, where an –ing needs to be hazarded to convey the derivation of the phrase, without turning the Wiki blue.