Silent Sam

Short definition from Wiktionary

Noun

1. 1
   A person who seldom or never speaks; a taciturn or unresponsive individual.
2. 2
   A machine, device, etc. which operates without making noticeable sound.
3. 3
   A mixed alcoholic beverage, usually containing vodka, a cola soft drink, and other ingredients.
4. 4
   Alternative form of Silent Sam.