Dribbleware is a type of software that doesn't work very well because the people who made it only give you tiny little updates at a time. It's like they are dribbling the updates out to you instead of giving you all the updates you need at once.
So, let's say there's a really cool game you want to play. But when you try to play it, it doesn't work very well. You keep getting stuck or it's really slow. That might be because the people who made the game are only giving you tiny updates. They might fix one thing today and another thing tomorrow.
This can be really frustrating because you want the game to work perfectly right away, but it won't because you're only getting tiny updates. It's like trying to build a sandcastle but only being allowed to use one grain of sand at a time. It takes forever and it's not very fun.
So, instead of dribbling out updates, it's better when the people who make software give you all the updates you need at once. That way, everything can work properly and you can enjoy the game or program or whatever it is you're using.