"lah"

"Lah" in Singlish is a discourse particle in Linguistics terms, that is, a word or a particle that does not change the semantic meaning of the sentence, but for pragmatic functions such as indicating tone. Examples of Usage: "There's something here for everyone lah."

Lah is used to emphasize certain words and make sentences more emphatic.  You may hear Singaporeans say, “Cannot, lah” or “Don’t hurry, lah.”

Sources: 

1. https://www.quora.com/Why-do-Singaporeans-say-lah-at-the-end-of-every-sentence
2. http://www.cullenhartley.com/2009/05/10-singlish-words-to-learn/