An unofficial day held every year on the second Friday of October (coincides with World Egg Day yearly). Typically falls around the 11th to the 14th of October depending on how the day falls.

The day began as a joke from online sex roleplay chatrooms but has gained some mainstream attention elsewhere online.

Free use means that a couple must engage in sex whenever one of the members of the couple wants to have sex, even if the other member is not horny. In free use, as long as one member is horny, the couple is required to have some kind of sexy time.
You: Hey babe, my cock is hard. Wanna fuck?

GF: Im tired, but hey its free use friday! Might as well.
by globutaroi July 2, 2022
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On October 15th is basically where you and your gf/bf/wife/husband /sneaky link what ever they are too you get to have $ex at anytime you want meaning if the person is horny they have $ex even if the other person isn't.
You: baby I'm horny
Gf: well it is free use Friday
by Kyle Bloomberg September 16, 2021
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