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1.
Adj., when someone generally known for dudeness seems or acts tired, down or dull; less dude than usual
What's up with him?

I don't know, but he's pretty subdude, like his dog died or something.
by Shiny Rider January 03, 2011
 
2.
An assistant or guy working under a dude, usually a specialist in a specific field.
Phil: Our shower STILL doesn't work!
Dude: Alright, I have a subdude who specializes in shower plumbing, so I'll call him.
by MpegEVIL June 21, 2011
 
3.
1) Someone who is a level below a dude.
2) A follower or lackey.
Joe is subdude. Every time he tries to be cool like Dave it ends in a major fail.
by Grill man October 17, 2010