The term 'problem with a fishing line' can be summarized by the four letter word 'SNAG'. A SNAG is an obstruction in a fishing line, such as a branch or weed, which can cause the line to become tangled and difficult to manage. It can also refer to a fish that has become hooked on the line, making it difficult to reel in. Snags are a common problem for fishermen, and can be difficult to remove without damaging the line.