While the Marauders (James Potter, Sirius Black, Remus Lupin, and Peter Pettigrew) used the map to get into trouble, and Snape was often their target, the map itself never directly addressed Snape.
Perhaps you're thinking of a scene where the Marauders made fun of Snape using the map's ability to show his location, or perhaps you're thinking of a fan-fiction scenario? Could you tell me more about what you're remembering?