A lousy poker player is often humorously referred to as a "fish" in poker slang. This term is used to describe someone who is inexperienced or makes poor decisions at the poker table.
3 and 8, 3 and 7. 3-8 offsuit and 3-7 offsuit are two of the worst poker cards to play and one of the worst hands in poker. These awful poker hands or the worst ones are marginally better than 2 -7 offsuit, the worst card in poker, but they still can't create a straight or a flush.