The phenomenon in which being in love with someone makes them appear more physically attractive to you.
My wife's even prettier than the day we met! Must be the love goggles.
Wearing your "love goggles" is a mental state a person enters when they are so deeply and hopelessly in love that they are convinced thier partner is nearly perfect. They may comment on how wonderful thier partner's body is, or how handsome or pretty they are, when in reality, they aren't. It's similar to wearing "beer goggles", where all women look beautiful after you've had a few, but without the alcohol; "love goggles" is a similar effect that is based on emotion.
"Hey baby, you have such a hot body, you're built like a weightlifter".
reply: "Thank you, but no I'm not. You need remove your "love goggles" and return to reality.