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.
The thumb. noun. The thumb is the short finger on your hand that is nearest your wrist. The short finger on your hand that is opposable to your other fingers is an example of a thumb. To thumb is to use the short finger of your hand to touch something or to turn the pages of a book. When you turn the pages of a book using the short finger on your hand, this is an example of a time when you thumb through the book.