Stud Face 

The expression you give when you are in an awkward position, and you have no idea how to react.

When everyone is singing Happy Birthday to you, you give a stud face because you don't know how to properly react.

Stud Face by Pro_mo June 19, 2016

studface 

any guy who is attractive and deserves a nickname like this

wow, adam is such a studface even though i'm better than him

studface by meee456 June 10, 2008