Abbreviation of "We're so similar", denoting a common point of interest between two or more individuals. The expression, often used enthusiastically and quickly after an affirming statement, is intended to further connect and bring together participants in a conversation.
A: I went shopping at Eaton's last night
B: I was there too! WSS!!!!
C: I'm writing my term paper on the German fountain pen industry.
D: Hey, I wrote a paper on that last year! WSS!!!!
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