Indonesian slang, which comes from Hokkien language (usually used by some communities in Medan, Palembang, and Pekanbaru) and then become a loanwords in Singlish (Singaporean-English)
"Kaypoh" which means "really curious" defines a condition when a person wanna know about everything.
Yet Kepo stands for "Knowing Every Particular Object", defines the same like what "Kaypoh" means.
It's a different language, but has the same definition at the same time.
"How much did your Boss pay you?"
"Why are you so kepo?"

2. kepo
Kepo is everything and anything. It could be used as adjective, noun, and/or verb
Via Urban Dictionary
