1 definition by Mushroom Webster

Top Definition
Personality syndrome identified by low self esteem in association with a disproportionately small penis. Symptoms include, but are not limited to, the provocation of others in argument in an effort to boost the Small Penis Syndrome (SPS) sufferer's low self esteem. SPS is easily identifiable among owners of monster trucks and forum trolls. SPS sufferers often associate themselves with the American Quarter Horse (AQH) in a paradoxical display of horse penis envy. There is no known cure for SPS, however, ignoring those afflicted with the syndrome will make them go away.
Just ignore the troll. He has Small Penis Syndrome and is just attempting to boost his self esteem by provoking others.
by Mushroom Webster March 02, 2010

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