FILLIP
bonus, fillip
(noun) anything that tends to arouse; “his approval was an added fillip”
Source: WordNet® 3.1
Etymology
Noun
fillip (plural fillips)
(archaic) The action of holding the tip of a finger against the thumb and then releasing it with a snap; a flick.
A smart strike or tap made using this action, or (by extension) by other means.
(by extension) Something unimportant, a trifle; also, the brief time it takes to flick one's finger (see noun sense 1); a jiffy.
(by extension) Something that excites or stimulates.
Verb
fillip (third-person singular simple present fillips, present participle (archaic) fillipping or filliping, simple past and past participle (archaic) fillipped or filliped)
(transitive) To strike, project, or propel with a fillip (that is, a finger released quickly after being pressed against the thumb); to flick.
(transitive, by extension) To project quickly; to snap.
(transitive, by extension) To strike or tap smartly.
(transitive, figuratively) To drive as if by a fillip (noun sense 1); to excite, stimulate, whet.
(ambitransitive) To make a fillip (noun sense 1) (with the fingers).
Source: Wiktionary
Fil"lip, v. t. [imp. & p. p. Filliped; p. pr. & vb. n. Filliping.]
Etym: [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.
2. To snap; to project quickly.
The use of the elastic switch to fillip small missiles with. Tylor.
Fil"lip, n.
1. A jerk of the finger forced suddenly from the thumb; a smart blow.
2. Something serving to rouse or excite.
I take a glass of grog for a filip. Dickens.
Source: Webster’s Unabridged Dictionary 1913 Edition