User blog comment:VicoPaz97/Who's an underdog... and who's not?/@comment-25285054-20141122200206

In Total Drama terms that refers to characters who get little to no screentime, while All-Stars/Screenhogs refers to characters who usually make it far. For example, Staci, Ezekiel, and Eva are underdogs while Duncan, Cameron, and Courtney are All-Stars.

However in character terms it can also mean someone you would never expect to win, and might look out of place getting very far. For example, in this definition Cameron, Shawn, and Beth can be considered "underdogs" while Jo, Sky,  and Lightning not so much.