Dobber is a British slang word used to describe a person who is lazy or inactive. Synonyms for dobber include words like slothful, idle, sluggish, lethargic, and lazybones. Other synonyms for dobber are slacker, loafer, deadbeat, drone, and shirker. All of these words describe a person who lacks motivation and fails to put in a significant amount of effort. It is important to remember that these words should be used with caution as they can come across as judgmental or insulting. However, they are useful to describe behavior that should be improved upon, such as being more productive or motivated.