The Full Form of PWID is Possession with Intent to Distribute.

Possession with intent to distribute is a much more serious charge than simple possession. A charge of drug possession assumes that the drugs are for your personal use. While possessing drugs is illegal, the penalties are far less severe than if you are in possession of enough drugs that the police believe you intend to distribute them.

If you’re charged with possession with intent to deliver (PWID) you are considered a drug dealer rather than just a drug user. If you are in possession of only a small amount of drugs, you would be charged with drug possession; anything more than what would be considered for personal use and you can face charges for distribution.

Distribution charges are determined based not only on the amount of drugs that you have in your possession, but also if there is any other evidence that would tend to suggest it was for more than personal use, such as the presence of scales, plastic baggies, money, drugs in multiple bags, etc.  If you have any part in the drug distribution process, you can be charged with PWID.