bombasing--prophetes.ai

† ˈbombasing, n. Obs.
  In 6 bum-.
  [f. bombase v. + -ing¹.]
  1. = bombasine 2 (perh. a corruption).

1580 Baret Alv. Bumbasing or anything made of cotten.

2. Padding with bombace.

1598 Florio, Imbottitura..a quilting, a bumbasing.

Oxford English Dictionary