What's "mess around" mean?

Native speaker’s answer
Rebecca
To "mess around" means to behave in a silly or playful way. But it can also denote being mischievous or engaging in sexual activity depending on the context. In a song about parties, it probably leans towards sexual activity. Ex: We were messing around, and then we accidentally broke the swing. => playful Ex: Kids always mess around. => mischievous