Official bad bitch season. It's summer, the sun is out, it's warm; and its time to fuck shit up. It's time to look good as fuck, and do nothing but what makes you happy. Twerk your ass off and give no fucks because life is too short. Aka best time of the year.
When it starts to get warm or nice outside after a long crazy season. Everyone starts to wear tank-tops, shorts and t-shirts. This is used after the winter time is over.
Ex 1: It's act up weather so I'ma put on some booty shorts.
Ex 1: Time to wear something cool, it's that act up weather season.