"Kick in teeth" is a phrase synonymous with betrayal, disappointment, or a sudden and unexpected setback. Antonyms for this phrase would be supporting, encouraging, or rewarding. Instead of feeling like you've been kicked in the teeth, you would feel like you have been given a boost, a pat on the back, or a helping hand. Alternatively, you could feel like you've had a stroke of luck, a moment of serendipity, or a chance to shine. The opposite of a "kick in the teeth" may not happen as often as we would like, but when it does, it can bring a sense of relief, hopefulness, and gratitude, reminding us that the world is full of good things waiting to happen.