Two drug dealers got ripped off by a homeless man toting a sawed-off shotgun after they agreed to meet with him in Orland Park so he could buy some pot, police said.

One of the pot dealers, a 21-year-old woman, knew the homeless man from high school and they connected on Snapchat so he could buy some drugs, police said.

The woman and a 28-year-old man headed over to Melrose Court to meet with 25-year-old Jeffrey Alberts, police said, but instead of buying marijuana from the couple, Alberts produced a sawed-off shotgun and stole it from them. He also allegedly took some money.