Literally, the couplet means that finally, I was ensnared in the snare of your tresses, and my heart became utterly heedless.

This powerful couplet speaks to the irresistible trap of beauty. Mir Taqi Mir suggests that the moment he became entangled in the captivating allure of the beloved's tresses, he realized his heart had been dangerously heedless. It's a classic expression of a lover's helplessness—how even the purest heart can lose its sense of self when confronted by overwhelming charm. The beauty itself becomes the cage.