mo
noun [ S ] UK informal uk/məʊ/ us/moʊ/
片刻,瞬间,一会儿
a short period of time; a moment
"Come on! We're going to be late." "Hang on a mo! I'll just get my wallet." “快点!我们要晚了。”“等一会儿!我拿上钱包就走。”
I'll be with you in a mo (= very soon). 我一会儿就来。