dap someone up
phrasal verb with dap verb uk/dæp/ us/dæp/ -pp-
US informal与（某人）触拳（以示问候、庆祝或崇敬等）
to knock your fist against someone else's fist as a greeting or an expression of admiration
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。