tushie

slang One's buttocks. Likely derived from the Yiddish term "tokhes" (often rendered in English as "tuchus" or "tookus"). You sit on your tushie all day and all evening, and then you wonder why you have such trouble losing weight. He needs a swift kick in the tushie to get his life in order! Has anyone ever told you that you've got a really cute tushie?