详细解释:n. 手提皮箱, 小皮包, (美)(非正式)屁股
英语解释：
名词 keister:
the fleshy part of the human body that you sit on同义词：buttocks, nates, arse, butt, backside, bum, buns, can, fundament, hindquarters, hind end, posterior, prat, rear, rear end, rump, stern, seat, tail, tail end, tooshie, tush, bottom, behind, derriere, fanny, ass