Slang for saving and/or helping someone in a situation such as avoiding stalkers or carrying someone out of a burning building. Most commonly used as a term for those who manage to keep the buttons on a jacket from receiving much stress.
Dude 1: I'm gonna sit down
Dude 2: Unbutton your jacket! Keeping it buttoned and sitting down could strech them out!
Dude 1: thanks man! You saved my buttons!