H2S

H2S and H2S take the following meanings:hydrogen sulfide, a chemical compound that smells like rotten eggs.H2S radar, the first airborne ground-mapping radar used during World War IIAn abbreviated acronym for the (somewhat unwieldy) title of the Broadway Musical "How to Succeed in Business Without Really Trying."
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Gas emitted during organic decomposition. Also a by-product of oil refining and burning. Smells like rotten eggs and, in heavy concentration, can kill or cause illness.

How to Succeed in Business Without Really Trying (Also abbreviated H2$)  For more possible definitions for H2S, click here
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A flammable, colorless gaseous compound of Hydrogen and Sulfur (H2S) , which in small amounts has the odor of rotten eggs. Sometimes found in Petroleum, it causes the foul smell of Petroleum fractions. In dangerous concentrations, it is extremely corrosive and poisonous, causing damage to skin, eyes, breathing passages, and lungs and attacking and paralyzing the nervous system, particularly that part controlling the lungs and heart. In large amounts, it deadens the sense of smell. Also called : Hepatic Gas of Sulfureted Hydrogen