the act of removing all the contents of someones bag(usually a school bag), turning the bag inside out, and placing all the books back inside before zipping it up.
1.Mike: Not again, who snugged my bag this time?
John: Relax, snugging is a joke, man.
2. Teacher: I'm sick of all the guys snugging eachother during class. The next person that does it gets a detention!