Top Definition
The Name that Thailand was known until 1939
ahh..Yes, I'd like to send this letter to the Prussian
consulate in Siam by aeromail. Am I too late for the 4:30 autogyro?
by Brother Number One November 06, 2003

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Singaporean/Malaysian slang for "get lost" or "go away"
Hey, you look troubled, is there anyth-
SIAM LAH!
by the guys who brought you... March 18, 2011

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Acronym for Standard Issue Action Movie. Used for a movie that ticks all the boxes required for the action movie genre and no more... Thus being 'Standard Issue'.
Chez: "I went to go and see the A-Team last night."
Nobby: "How was it?"
Chez: "Was just a SIAM dude. Alright but just went through the motions."
by chez-a-pez January 20, 2011

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Not to be confused with siam the former name for Thailand. SIAM or Sonia Is A Man, can be used at anyone who is pretending to be female whilst obviously looking like a man.
Hey what is that?
Not sure is it a girl.......no SIAM.
Oh ok thought so.....gross.
by St Matthew November 23, 2008

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Siam is a name commonly known as Thailand

Siam means the person that is a smartass
What a "Siam" that idiot is,,,
by The "S" Team May 16, 2016

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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