pre-fire in counter-strike
generally occurs when one player is aorund a corner or behind a barrier, and either sees, hears, or notices a player from the opposite team on radar, moving towards their position. To gain the advantage, the player will begin firing before the opposite player is again in their sights(in the assumption that if that opposite player were to keep their same course, they would run into the 'promy', or prefire

When some little bitchboy is acting like a little tiny pee pee poo poo baby and messing up the group plans.

To be promy is to be warm and comfortable. A sensation of contentment and comfort.