Klein Dictionary, שׁרבט ᴵ 1

שׁרבט ᴵ to stretch, stiffen; to flog, whip.
    — Pi. - שִׁרְבֵּט 1 he stretched, stiffened (an animal to give it an attractive appearance, so that he should be able to sell it more easily); 2 he pouted (his lips); 3 he flogged, whipped.
    — Pu. - שֻׁרְבַּט 1 was stretched, was stiffened; 2 was flogged, was whipped.
    — Nith. - נִשְׁתַּרְבֵּט (of s.m.). [Denominated from שַׁרְבִּיט.]