This word is used widely by Malaysians and also Singaporeans. This word is also known as one of the most super negative word. It is not a swear word, believe it or not. It's an expression of a combination of multiple negative feelings as follows:-

bored, fed up, sick of it, soured, bitter, headache, monotonous and any negative feelings you can think of.

A term used to reference cannabis/marijuana/weed.

Boring in Chinese. Used often in Malaysia and Singapore

Sien is the most gorgeous girl you will ever meet. She is very beautiful but doesn't realize it and that's what makes her so beautiful. She has the funniest laugh that will make you also die with laughter. She’s extremely relatable and hilarious and she understands people and reads them very well. She's very social and talks to everyone. Sien gets along with literally everyone. She’s an amazing singer and dancer and loves spending time with her friends!

used to be science but messed up

Ahh yes, the sien. One of the fierce-known warriors of Halo I & Halo II. If you ever come across a sien, chances are you will never know, for a shot so clean and crisp has just sliced through your cerebral cortex leaving you incapacitated... yes, Headshot!

Sien is a loyal funny and caring person. She is always happy and will give you joy whenever you are around her. If you leave her for someone else yoi are the most stupid person alive.