سمهدرسَمَهْدَرٌ Fat, as an epithet, (S, K,) applied to a boy, in praise of his fleshiness; (Fr, S;) a boy fat and fleshy. (TA.) b2:  (tropical:)  The penis, (K,) as likened to a fat, or fat and fleshy, boy. (TA.) b3: Applied to a country, or region, (بَلَدٌ,) Ample, (S, K,) wide, or far-extending, in its limits: or in which the sight is perplexed by its levelness. (TA.) b4:  A land far-extending; that causes one to lose his way in it. (K, TA.)