In TV shows or movies when the character's guns mysteriously appear in their hands without being drawn.
The term BSG Fast-Draw comes from the Original Battlestar Galactica series, in which they had a problem with their oversized holsters, so they edited the scenes to simply show the pistols in their hands without showing the actors drawing the weapons.
A Marijuana - consuming game following the rules of an ordinary round of "indian", "killer" or basically the game in which the joint is passed around in a circle, and each "player" must hold in the smoke until their next turn, or they get called a pussy or other such insults. The only difference in Three Draw Fuck Up is that instead of taking one draw and holding until next turn, three draws are taken. Pretty self explantory, really.