In shorthand
2-D fighting game notation, this stands for "cross up" or "
cancel". A cross up is a move wherein the fighter launches an
aerial attack that flies just over his opponent's head and clips him on the neck. Sometimes called a "neck hit". Quite effective but a little tricky to do. A cancel is a move that a fighter launches before a previous move is over.
M Bison can use a good cancel in
the combo: Lv2 Knee Press Nightmare XX Fierce Psycho Crusher
Geese Howard can chain a good cancel in the combo: Crossup Jumping Forward, Standing Short x2, Standing/Crouching Fierce XX Deadly Rave (before
last hit), Standing Short, Standing Fierce, Forward Jai-i-ken.
Scary, isn't it?