What does Matthew 8:25 mean?

A boat carrying Jesus and His disciples is beginning to "swamp"—to take on water—amid a sudden and violent storm on the Sea of Galilee (Matthew 8:23–24). At least a few of the disciples were experienced fishermen who had encountered storms before. And yet, in this situation, they are alarmed at the waves pouring into the boat. This is not simply an instance of irrational fear; there is real danger that the boat will sink, and the passengers will drown. Finally, the disciples wake Jesus up and cry out to Him, fearing for their lives.

In Mark's telling of the story (Mark 4:35–41), the disciples wake Jesus with an accusation, "Do you care that we're dying?" It is likely that different disciples said different things. What's universal is that they were sure the end was near, and they did not understand how Jesus could sleep through it. They wanted Him to wake up and save them before it was too late.