Let me explain Cavs what they mean----
upset (term you are using Cavs)- to defeat or overthrow an opponent that is considered more formidable, as in war, politics, or sports.
Upset (term used by Dale, Henry, and bigstop)-to disturb mentally or emotionally; perturb i.e Emerald (or anyone for that matter) puting 19 on an opponent
Hope that clears that up