A jester juice is a person who is always toxic and/or manipulative. They think they are being funny at first, but later their anger issuesovertake them and make them lash out at people controllably.
It's the same as no nut november just for girls/anyone with a vag. During july you can't, finger, touch your vag, send/take/post nudes, watch/read porn, squirt. If you birthday is in july you get one free pass, but its best if you don't do it at all. If you fail you will be seen as weak and Horny.