Serotonin syndrome. Serotonin syndrome is a potentially life-threatening drug reaction that may occur following therapeutic drug use, inadvertent interactions between drugs, overdose of particular drugs, or the recreational use of certain drugs. The excess serotonin activity produces a spectrum of specific symptoms including cognitive, autonomic, and somatic effects. The symptoms may range from barely perceptible to fatal. Numerous drugs and drug combinations have been reported to produce serotonin syndrome.
middle finger (plural middle fingers) 1  The finger between the forefinger and the ring finger; this is the longest finger. 2  An obscene gesture directed towards another as an insult: a literal or sometimes figurative raising of the middle finger at someone.
English Language Usage: Common American English vernacular (not sure of other languages) is somewhat mixed on the usage. The index is referred to as an index finger, middle as a middle finger, and so on. The thumb is not referred to as a thumb finger. And yet, if the doctor tells you that your newborn baby is healthy with 10 fingers and 10 toes you know exactly what they mean.