Definition of hocussing:
(v) :
To play a trick on, to trick (someone); to hoax; to cheat.
(n) :
Trick; trickery.
(v) :
(obsolete) To stupefy (someone) with drugged liquor (especially in order to steal from them).
(v) :
(obsolete) To drug (liquor).
(v) :
(obsolete) To adulterate (food).
(n) :
(obsolete) A magician, illusionist, one who practises sleight of hand.