As Singaporeans, we've got to know LAH!!!

Fuck spider
-Used to express extreme frustration. Originates from the Army, where a "spider" was dirt in the barrel of one's rifle. If during inspection, you found a "spider" in your rifle, you'd have to strip it and clean it all over again. Hence, the term would be a rather common expletive uttered amongst recruits forced to clean their rifles over and over again.

GGXX
Adapated from arcade games, where during the end of a sparring game, the words 'GGXX', meaning 'good game' and 'game over', will be displayed prominently on the screen. It is frequently used in its short form 'GG', both forms of which means that you are doomed (i.e. game over). Rumour has it that the XX stems from the practice of a 'redouble' in contract bridge convention. If you continue like this and don't study, your exam sure ggxx liao.

Jiak zhua
Hokkien. Refers to a skiver, or the act of skiving. Lit. "to eat snake".

Kan ni na bu (chao chee bye)
Hokkien. Vulgar. Lit. "Fuck your mother", this is the archetypal Singlish insult, but it is often used just as an intensifier akin to English "fucking", and commonly abbreviated as "KNN" in written form. The long form "KNNBCCB", meaning "fuck your mother's smelly cunt", is extremely rude.

Kaopeh kaobu
Hokkien. (哭父哭母) Complain too much. Commonly abbreviated as "KPKB". Literally "cry for your parents".

Ki Chia
(literally "Up the Car") Used to describe something very bad. Eg 'My exam ki chia liao.' Possibly derived from the action of an injured person being lifted into an ambulance. Another term used is "Up Lorry".

Kio Kuay
Hokkien(叫鸡）lit.Call Chicken. Go look for prostitutes

Kope
(copy) to take without permission. "eh, don't kope my homework leh"

Kum Lan
Suck Cock

Lim peh
Hokkien. Used when demonstrating authority, usually in a sneering manner. Lit. "your father".

Lim bu
An offshoot from the term Lim peh, used perhaps as a demonstration of feminist power, as opposed to patriachy in the term 'lim peh'. Lit. "your mother"

Luan hoot!
Hokkien. To bark up the wrong tree; to cast a wide net hoping to catch something. Lit. "randomly hit".

Mangali / Mankali
A corruption of "Bengali". A crude way to refer to ethnic Indians.

Merlion
(verb) To vomit, especially after drinking. Also used in the Navy to describe sailors vomiting due to seasickness. A reference to the famous Merlion statues

Ngeow Chee Ngeow Lan
Extremely Stingy

Pu Bor
Teochew. Vulgar. Lit. "Fuck your mother", is extremely rude.

Puah Chee Bye
Torn vagina