Red Five
Heisman Trophy Winner
So they are saying it's more likely Nebraska will have 7 wins then 8 wins so you have to pay a "premium" of that to make that bet. You get a premium on the over as they deem that is the lesser scenario.
Pretty sure they are saying that is it more likely that Nebraska will have 8+ wins since that is the "favorite" at -140. 7 or less is the "underdog" at +120.
If you bet the over you have to lay $140 to win $100. If you bet the under you have to lay $100 to win $120.