slowpoke

noun

1. (Canada, US, derogatory, informal, mildly)A person who moves slowly or takes a long time to do something.

   “Hey, you slowpokes in the back! Get a move on!”

   “"Yas'm," said Prissy and, turning, sauntered down the walk at snail's gait. "Hurry, you slow poke!"”

   “Some cooks are diddlers and slowpokes. Some are efficient speed demons.”