The term 'perform poorly' can be summarized by the crossword solutions of 'TANK', 'STINK', 'BOMB', and 'lookbad'. 'TANK' is a verb meaning to fail completely, while 'STINK' is an informal way of saying something is bad or of poor quality. 'BOMB' is another verb meaning to fail miserably, and 'lookbad' is an adjective describing something that appears to be of low quality. All of these words are used to describe a situation in which someone or something has performed poorly.