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1.
lah
a slang used mainly by people of South-East Asia (Malaysia and Singapore mainly) to complement almost any sentence available in a social conversation. the origins of this slang is basically from the chinese language, yet it is now used by almost anyone in the two countries mentioned above who aren't too shy to let their asian roots shine with pride. people who don't use the -lah slang is considered a snob to a certain degree.
A: Hey, can you lend me five ringgit?
B: sorry lah, I need money to pay for my cab and lunch-lah

C: can you help me for a minute?
D: ok-lah.
by calV April 30, 2005
 
2.
lah
A suffix of no standard meaning used by Malaysians in their very own version of the english language (affectionately named Manglish) to spice up sentences and to express very different meanings according to the way it is said.

adopted from the Malay language and widely used by Malaysians regardless of race.

also used as an "economiser" that shortens sentences by 80 percent.
come on, lah!
translation: "come on, don't be shy" or "come on, don't waste anymore time"

ok-lah
translation: "Okay, okay, I'm sorry" (if said in apologetic manner)

examples listed above are not sufficient to fully understand the deep and intimate meaning of "lah". Contact a Malaysian friend for phonetic guide and a proper understanding of this mysterious syllable.
by Easy February 07, 2005
 
3.
lah
Slang. Malaysian/ singaporean colloqial language. A suffix to place emphasis on the sentence/word before.
Also, la, leh, ler, le, laa.
Is she your girlfriend?
No lah!!! That one is Jimmy's one lah.

He is crazy one lah!

This chow kuey tiaw (fried rice noodles) is the best one in town lah.
by SthEstAzn January 02, 2008
 
4.
A non-discriminant Acronym standing for "Look at her/Look at Him"
Damn! L.A.H.! Girl in the black dress!
by Cheeto92 July 17, 2014
 
5.
lah
Mary Jane, Weed, Grass, Ganja, Pot, Dope, Marijuana
Let's puff some of that Lah!!!
by AC November 28, 2003
 
6.
lah
Slang term for marijuana.
My people, we get high, fillin' cigars with the lah.
by RushRush October 07, 2003
 
7.
lah
An acronym for Lame as Hell. Used as a response to something lame.
A: Dude, we had the final boss down to 1 hp and then it reset on us =(.
B:Dude that is lah.
by sirburpsalot February 23, 2011