BLECCH is an interjection used to express disgust or distaste. It is often used in response to something that is unpleasant or unappealing. The crossword solutions for the term BLECCH are UGH (3 letters), YUCK (4 letters), and PTUI (4 letters). UGH is an expression of disgust, YUCK is an exclamation of revulsion, and PTUI is an expression of contempt. All three words are used to express a negative reaction to something.