Dictionary definition of a "Plugger"
Plugger \Plug"ger\, n. One who, or that which, plugs. (2) Steady, dogged and usually uninspired worker.
Source: Webster's Revised Unabridged Dictionary
Plugger n: someone who is an active supporter and advocate [syn: promoter, booster]
Source: WordNet ® 1.6
OK all dictionaries aside, what's a Plugger?
Pluggers are the hard-working people the world depends on. They represent the 80 percent of humanity who unceremoniously keep plugging along, balancing work, play and family life. Pluggers encounter and conquer obstacles in their lives, but they always have a positive attitude and a good sense of humor. They're the people who work hard for what they get. Even if they're struggling, they are optimistic about life.