A diminutive form of שָׁמֵן (shamén, “fat”), formed by reduplication.
שְׁמַנְמַן • (shmanmán) (feminine שְׁמַנְמַנָּה, masculine plural שְׁמַנְמַנִּים, feminine plural שְׁמַנְמַנּוֹת) [pattern: קְטַלְטַל]