Doctor Swiing's definitions
A girl whose tits look small when wearing a loose shirt (such as a polo shirt), but are actually larger than they seem.
Damn, I thought her tits were small when she had that uniform on, but when I saw her in a bikini I realized she had hidden hills!
by Doctor Swiing August 30, 2007
Get the hidden hillsmug. The look a person gets when they try their first beer bong. A mixture of surprise, pain, and joy. Usually the eyes become huge, but then revert to normal in an attempt to act "cool".
by Doctor Swiing August 30, 2007
Get the bongfacemug.