(idiomatic) To reflect badly on or to hurt in some way.

plural of most favored nation

(trade, diplomacy) A nation accorded a certain level of treatment in international trade. When a nation A is a most favored nation of another nation, B, then B undertakes not to treat A any less favorably (in terms of taxes, exports, etc.) than any of B's other most favored nations.

People often practice favoritism when awarding benefits to others.

Alternative form of without fear or favour

(humorous) Used to wish someone luck in an adverse or uncertain situation.

plural of Favors