Archaic term for either a type of large knife, or a knife fight. From the middle Dutch "steken of snijden", where "steken" translates to "to thrust or stab" and "snijden" to "to cut or slash".
This is one of many archaic terms that Lewis Carroll bastardized for use as nonsense words in Jabberwocky.
One, two! One, two! And through and through
The vorpal blade went snicker-snack!"