(Judaism) Observance of a law to an extent beyond that required by the laxest interpretation.
2003 September 19, mos...@mm.huji.ac.il, “Rabbi Shmuli Boteach Refuted”, in soc.culture.jewish.moderated[1] (Usenet):
[Pesach] should be a time of feeling closeness to G-d and thankfulness for his deliverance. Getting hung up on "chumros" could end up being an ego-trip all of it's[sic] own.