frogification phenomenon; aversion to a reciprocated crush
Originates from Grimm's The Frog Prince; describes suddenly losing romantic interest when the other person returns your feelings. Often used in youth slang and social media.
After the person I liked confessed and we started dating, I suddenly lost interest. Is this the frogification phenomenon?
disillusionment with a partner's flaws
Colloquial extension: becoming turned off after noticing negative traits in a romantic partner, not necessarily related to reciprocation.
His room was so messy that I experienced the frogification phenomenon.