Top definition
The day when a girl taking birth control pills switches from the active pill to the placebo sugar pill. This normally occurs on Sunday because of how the pills are labeled. This can serve as a helpful warning for people to be careful around the taker of the sugar pill.
Be careful it's sugar pill Sunday and you know how she can get.
by beckyinspired January 24, 2012
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug