Top Definition
When a "woman" unexpectedly reveals that she is, in fact, a man and has a penis. It is called a Thai surprise due to the extra convincing look of Thai men posing as women.
I got back to my place with that Asian girl from the bar and she gave me the Thai surprise, I'm pretty sure her penis was just as big as mine.
by Thean1894 May 07, 2013
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