Tar burger

What builders look like they are making when they are actually making tar for putting on roof tops. This is because if you didn't know what they were actually doing it would look like they were having a barbeque.

Person 1: "I swear that those builders are not paid to cook burgers!"

Person 2: "No their not, idiot. they're just making tar"

Person 1: "Tar burgers?"

Person 2: "No."