Top definition
When you pretend like you are sick all day but then someone asks you to go out at night and all of a sudden you're all better.
Day: Honey, I'm so sick. You take care of the kids.

Night: I'm feeling a little better. Joe asked me to go to the bar. See you later.

Wife: I thought you were sick
Husband: I was just day sick.
by mcoop21 February 06, 2017
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