He hears a man yelling, "Get your dam fish here!" The man is puzzled and asks the man, "Why are you saying such bad things about these fish?" The fish vendor laughs and says, "No no, these are DAM fish--as in they were caught near the dam." "Oh I see," exclaimed the man, "I'll take some dam fish."

The man walks home and tells his wife, "Honey, can you cook these dam fish for dinner?" The wife looks surprised and says to her husband, "Why are you using such explicit words?" The man laughs and says, "No honey, these are DAM fish--as in they were caught near the damn." The wife laughs and says, "Oh I see, I'll cook these dam fish."

Later at dinner the man says to his son, "Son, can you pass the dam fish?" The sons says, "That's the spirit Dad!" He passes the dam fish to his Dad. "Can you pass me the fucking potatoes?"

Edit: I don't know the original author of this joke, but I heard it from my brother and wanted to share