A man walks into a bar with a slab of asphalt under his arm.
He approaches the bartender and says, "I'll have a beer, please, and one for the road!"
The joke is a play on words and relies on the double meaning of the phrase "one for the road." In this context, the man is requesting two beers: one for himself and another one for the slab of asphalt he brought with him, which represents "the road."
The phrase "one for the road" is commonly used to refer to having one last drink before leaving a place. However, in this joke, the phrase is taken literally, making it a pun and creating humor in the unexpected twist. The listener might have anticipated the usual meaning of the phrase, but the punchline reveals a different interpretation, leading to amusement.