My family sings a song on Purim that I am trying to track down. It is mostly Yiddish, with a little bit of Hebrew. The song starts with
פֿאַרוואָס זאָגט די תורה האָב נישט קיין מורא
and ends with
מחה תמחה את זכר עמלק
The song is obviously (from those lyrics) Jewish in content. Does anyone know what the title of the song is, and what the full lyrics are?