It is a Hokkien(a Chinese dialect) or Taiwanese word for female sexual organ, literally.
It also means a girl, a bastard, a dickhead, a shithole and a motherfucker, etc..(see example 1 below)
(not often)It may also be a negative supportive adjective to be placed in front of a subject noun, like "fucking shit" in english. However, this word is always for describing negative things, not exactly like "fucking" in english. In english, "fucking" can be added in front of a subject or noun to express "very much". But, ci bai never has this linguistic function. (see example 2 below)
That man has just stolen my wallet, cibai !
That cibai has just kicked me in my groin !
Man A: Sup dog? U look fucked. Wut's wrong ?
Man B: Man I caught that cibai from my hood shacking with my girl on my bed last night !
Example 2 :
cibai kia/gia/gaah = fucking kid
(most common example, and perhaps the only example in this category)
To emphasize on rudeness, some people actually add "chau" (which means smelly) in the front as in "chau cibai".
"Cibai" can also be added in front of another noun to describe one's anger against the noun, such as "Cibai" Car, "Cibai" Face (or in Hokkien it is "Cibai Been"), "Cibai" Police, etc.
I will not work with that "Cibai" anymore