Derived from the word period as it is during this time that a woman's behavior or feeling temporarily changes. However, a weriod can happen with both males and females.
Timmy: Sorry, dude. I'm just on my weriod. I'll get over it by tomorrow.
I'm on my weriod so I can't come to the party today. :(
Get down from that pole! What's with you today? Are you on your weriod?