Stupsing is when you pullair through your teeth and let it pass over your tongue which is pressed against your cheek. This noise often denotes being "pissed off", "angry", or "disappointed"
The act of being a total wuss who can't take their booze.
You can spot a 'Cupper' at any party as they are the ones lifting the booze to their lips but failing to actually sup it!!!!
Barbara - "see Brian over there???...... you want to know why he's still standing?????"
Jesus - "Why...... I'm mashed, I've been sick in my hair and can barely see straight and we arrived at the same time?"