O little frog, seeing the rain clouds, you swell with pride, and with your incessant 'croak, croak', why do you vex me?

This couplet is like someone talking to a frog during the rainy season. It says, 'Oh frog, why do you get so puffed up and proud when you see the rain pouring down? Why do you keep croaking 'Draun Draun' so much and bother me?' It's a gentle scolding, hinting that when things go well for someone, they sometimes become overly boastful and annoying with their continuous talk or actions. The message is to not get too carried away by success or favorable circumstances, and certainly not to irritate others with your show-off behavior.