Slitter

[Greta]

(Scottish)

noun - person unable to eat or pour [liquids] without spilling half the contents down their front
verb - to unsuccessfully attempt ill-advised transfer of liquid or semi-liquid [foodstuffs] from one object to another; to eat [messily]
adjective form slittery

[Sonia]

[Slitter] is a slang term used for the word [cutter]. This is word is more commonly used by [Preps].

[Kai]

One who [slits]. This could be by working excessive amounts of time on mtuual fund tax [provisions] or on any other related slit material.
The person doing the slit work is the [slitter].