When you find out your crush has started a relationship with someone and you have a sour attitude towards life itself for the next three days.
Weston: George are you alright man?

George: Just a case of the three day downsies.

Weston:I...I am so sorry for you man.
by Adakrat October 14, 2012
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The three day test is something you do to see if your crush is interested in you. If you feel like you always start the conversations and so on then use this test. Give your crush three days to write to you. If they don’t then sorry your feelings are not replied.
“How do you know he likes you?”
”He passed the three day test!”
by Not Greta Thunberg November 10, 2019
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