labradoring
When someone forgets what they were doing because they're distracted like a dog who just saw a squirrel or a snack.
I was doing my math homework and then my dog saw a squirrel and now I'm distracted like a toddler.
This person is distracted like a dog who just saw a squirrel and forgot about their snack.
My dog is so distracted it forgot about its snack and now it's looking for a squirrel.