When under the influence of alcohol and they saysomething they wouldn’t normally say while sober; your true feelings and thoughts about a situation or person comes out.
When a sober guy hunts down an intoxicated female, and then proceeds to make sexual advances while pretending to be under the influence himself;normally sober sharks have 70% success rate,while sober sharks wearing a shirt made by Hollister or Polo will have success 92% of the time. A sober shark is typically disgraced the next day by his bros, and furthermore can expect to not get any for an extended period of time.
Jason drank 1 beer while that girl chugged vodka, and the next time we saw them they were half naked in his bed. What a fucking sober shark.
Someone who volunteers to keep an eye on someone who is intoxicated. They are always sober, or at least have control over themselves and are able to "sit" (babysit) the intoxicated person to prevent them from accidentally harming themselves (from falling and such). They should be someone trustworthy. This practice is recommended for strong mind-altering psychedelic drugs, such as Salvia, Phencycladine, Jimson Weed, and Ketamine.