The phrase "to force down" means to bring something or someone down by using force. It can be used in various contexts, such as forcing an airplane to descend quickly due to bad weather conditions, pushing a person back into their seat with great force during turbulence, or making someone submit to your will through intimidation or coercion. The phrase is often used metaphorically to describe situations where one party uses their power or influence to dominate another, such as in politics or business negotiations.