be on the up and upa) British EnglishBrE informalSUCCESSFUL to be becoming more successful 变得更加成功 a brilliant young player who is on the up and up 事业蒸蒸日上的一名杰出的年轻球员
b) American EnglishAmE spokenHONEST if a person or business is on the up and up, they are honest and do things legally 〔人或企业〕诚实守法
→ be on the up and up at up2(3)