do something till you are blue in the face成語所屬單字bluedo something till you are blue in the facedo something till you are blue in the face — 慣用語慣用語1. to keep trying or repeating something for a long time without success.1.慣用語釋義白費唇舌to keep trying or repeating something for a long time without success.例句You can warn Leo till you are blue in the face, but he will still speed.