What does crape myrtle mean for the first time?

As a network language, Wei Zi has a dirty meaning, which generally refers to the homonym of masturbation. The word "masturbation" is forbidden on all major online platforms and can't be typed. Even if it is typed, it will be in harmony with "* *". In order to express the same meaning, netizens used "Wei Zi" instead of "Wei Zi".