1. to remove the bag or bags from something
Usage: transitive; chiefly British
2. to pull down or remove the trousers or underwear of someone, typically as a prank or form of bullying
Usage: transitive; British slang; school context

Examples

• She began to debag the groceries as soon as she arrived home.
• The campers had to debag their supplies before setting up the tent.
• He debagged the equipment carefully to avoid damaging anything inside.
• The older students would debag younger boys as a cruel initiation ritual.
• After the prank, he was embarrassed about being debagged in front of everyone.