Rabbi Avraham Elimelech Biderman, also known as Reb Meilech (born 12 November 1967) is a Hasidic Jewish mashpia and lecturer with thousands of students and hundreds of followers, although he is not officially a Rebbe.

Biderman studied at the Ponevezh Yeshiva and then married the daughter of Rabbi Nosson Dovid Rosenbaum, the Rebbe of Zutska.

In the early 2000s, he began holding zitz at his home on Shabbat nights, with the participation of young Hasidic men, mainly from the Slabodka Yeshiva.

[1][2] On Lag BaOmer 2023, according to police estimates, approximately 40,000 people participated in the lighting of his bonfire, which was held in Complex 89 in Meron.

His students print a weekly newsletter with a collection of his talks called Torah Wellsprings, which is also distributed in English, Hebrew, Yiddish, French, and other languages.