1 definition by Meedama

An unexpected, incredibly large bowel movement that makes you feel as though you are lighter and increases your overall energy level.

Most day changers happen when you're already having a pretty good day. You might feel perfectly normal. Then you get the rumble. Nothing big just a little "hey when you get a chance" message from your belly region. Then you sit down and proceed give birth to a food baby you didn't even know was inside you. You walk out of the bathroom proud, accomplished, and feeling light on your feet. Your good day was just changed to a great day. Nothing can hold you back today.

Also you may feel hungry.
Person 1: walking around like king of the world almost glowing

Person 2: what's got you in such a good mood.

Person 1: just took a day changer. Nothing can stop me now!
by Meedama September 2, 2015
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