the extended period of numbness on the tip of your index finger (usually between 1 and 3 days) after you've been spray-painting for an extended period of time.
The act of blowing your nose by a combination of covering one nostril with a finger and clearing the other with a powerful nasal blast of air, for use when a suitable snot receptacle isn't available. Popluar with farmers and footballers and useful in the right situation, but not really acceptable among polite company. Unless you're desperate of course.