مُتَشَمِّسٌ
1.
[Sitting in or] setting himself up to [or exposing himself standing to] the sun. (K.)
2.
A man who defends what is behind his back: (ISh, TA:) a man strong (ISh, K, TA) in that which sustains or supports him; synonym قَوِىٌّ شَديدُ
القُومِيَّةِ: (ISh, TA:) Sgh says شَديدُ القُوَّةِ; but the former is the right reading: (TA:) and niggardly, tenacious, or avaricious, to the utmost degree. (K.)