being a slave of love; weakness from being in love
Refers to the vulnerability or disadvantage one has because they are in love with someone, often implying that the other person can exploit this emotional attachment.
Because I was so in love with her, I couldn't refuse her request.
They took advantage of my lovestruck weakness and made me buy an expensive ring.
Standard kanji spelling for this set phrase.
Variant spelling using 弱味; less common but seen.
Compound of 惚れた (perfective form of 惚れる 'to fall in love') + 弱み ('weakness'). The phrase literally means 'the weakness of having fallen in love'.