Green’s Dictionary of Slang

whisk n.1

an insignificant person, a whippersnapper [they make no more impression on the world than does a quick whisk on dirt].

[UK]R. Brome A Novella IV i i: nic.: This is the Gentleman. pi.: ’Tis the proud Braches whiske!
[UK]B.E. Dict. Canting Crew n.p.: Whisk a little inconsiderable, impertinent Fellow.
[UK]New Canting Dict. [as cit. c.1698].
[UK]Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
[UK]Grose Classical Dict. of the Vulgar Tongue.

In compounds

whiskbroom (n.)

(Aus.) a narrow beard running just below the jawline.

[Aus]Truth (Brisbane) 1 Aug. 20/4: The William Goat— this natty whisker goes around under the chin, and Iooks as though it were tied on with a string. Slang names for these beautiful hair trims are donegals, soup catchers, and whisk brooms.