NOVELTY - The portable compact electrolytic hydrogen-oxygen gas generating and conditioning apparatus (10) has a gas outlet (16) which is in communication with a gas conditioning unit (15) and has safety mechanism for preventing any gas flashback occurrence. A spill prevention mechanism (17) prevents any water splash and spill or leakage tendencies into the gas outlet due to presence of a suction pressure in the gas outlet. The spill prevention mechanism also functions as a liquid and gas separator or gas dryer due to the constrictive and intricate structural attributes.    USE - Portable compact electrolytic hydrogen-oxygen gas generating and conditioning apparatus for use in vehicle. Uses include but are not limited to motorcycle, car, van, jeep bus, truck, heavy equipment, boat, aircraft, scooter, car/automobile and van/Asian Utility Vehicle (AUV).    ADVANTAGE - Provides a portable compact apparatus that is provided with built-in mechanism for preventing water splash and/or spill tendencies due to suction pressure from an engine manifold. Provides a portable compact apparatus that is capable of generating and conditioning water-derived hydrogen and oxygen gases by electrolysis within a single unitary upright device in which all essential components/elements are contained. Provides the apparatus capable of continuously operating in usage without worrying on a fully discharged/drained engine battery. Enables quickly and easy installation of the apparatus in a vehicle's engine, with the subsequent maintenance being easy. Provides a superior, clean stream of safely conditioned mix of hydrogen and oxygen gases to form portion of the petroleum-based fuel of an engine. Provides an apparatus that is very ergonomic, practical, simplistic, safe and efficient, easier, promising and more economical to manufacture and/or commercially engage with.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a portable compact electrolytic hydrogen-oxygen gas generating and conditioning apparatus.    Portable compact electrolytic hydrogen-oxygen gas generating and conditioning apparatus (10)    Gas conditioning unit (15)    Gas outlet (16)    Spill prevention mechanism (17)    Narrow exiting gas opening (20)