I think that's the point.
It's very easy to do, so if you can't it's quite pathetic.

Maybe.

EDIT: Seems nobody is quite sure: www.worldwidewords.org/qa/qa-cut1.htm

alt-usage-english.org/excerpts/fxcutthe.html
( Lonewolf - O R'lyeh? Ya R'lyeh!, Fri 4 Aug 2006, 8:18, archived)

Sir, I believe you cut the mustard.

( BindiBaji, Fri 4 Aug 2006, 8:19, archived)