The original definition is quite vague, however, it usually refers to someone who steps on lobsters.
Or in other cases, losing there hat at football games.
Look over there! We got to wish a happy birthday to that Chaggloaner!
Lending Chad from highschool money so he can pick up your crush in a fancy limousine
Simon decided to spend the night drinking alone after he was pressured into chaggloaning Tanner some cash.