Back filling. (Arch.) See under Back, a.
Fil"lip (?), v. t. [imp. & p. p. Filliped (?); p. pr. & vb. n.
Filliping.] [For filp, flip. Cf. Flippant.] 1. To strike with the nail
of the finger, first placed against the ball of the thumb, and forced
from that position with a sudden spring; to snap with the finger. "You
filip me o' the head." Shak.