From parash; excrement (as eliminated) -- dung.
see HEBREW parash
H6569. peresh
מֶּ֫רֶשׁ noun [masculine] faecal matter found in intestines of victim; — ׳פ absolute Malachi 2:3; construct 2:3; suffix מִּרְשׁוֺ Exodus 29:14; Leviticus 4:11; 8:17; מִּרְשָׁה Numbers 19:5; מִּרְשָׁם Leviticus 16:27 (all P).