niubi

A chinese word pronounce as "new-bee".
"niu" means cattle, which means be really good at something or can do something others definitely cannot do; formidable.
"bi" means pussy, often use as abbreviation for "zhuang-bi", which means pretending to be somebody for vanity; bravado.
so "niu-bi" means top, ace, powerful, brilliant, well trained, highly skilled, etc.

"look, he is handstanding to take a shit!"
"niubi!"