Can I take a 240 volt 33 amp male plug an slice
Yes, you can use existing wiring to feed a sub-panel.  (you cannot put a plug on a sub-panel as far as I know.)  If the wiring is not quite long enough to reach your sub-panel location, put a junction box there and splice to an additional cable. 

Your sub-panel absolutely requires a ground wire to the main panel.   Grounds can only be bare wire, green or green/yellow.  If the inspector sees any insulation other than that color, it cannot be a ground wire.

If your wire also has neutral, then you can make your sub-panel a 120/240V sub-panel.  Here's the trick: In the sub-panel, neutral must be isolated from ground.  Most panels give you a way to do that, by removing bonding straps or removing green screws. 

If your wire does not have neutral, your sub-panel will be 240V only.  Use 2-pole breakers and NEMA 6 receptacles.  If you power anything hard-wired, make sure it is 240V friendly - most new fluorescent ballasts are multi-voltage, as are many other products. 

If you need to run 120V-only appliances out of a 240V-only panel, they sell step-down transformers for sane prices.