“real牛逼”的缩写，常用来表达对某人或某事非常赞叹，觉得他们/它真的很牛！有时带些调侃意味。
ENAbbreviation for 'real niubi' (really awesome), often used to express great admiration for someone or something, feeling that they/it is truly awesome! Sometimes with a bit of a teasing tone.
“A：小李拿下全校第一了！
B：真是rnb啊，学霸无疑了。
