Definition from Wiktionary, the free dictionary
See also DAWG
dawg (plural dawgs)
- Eye dialect spelling of dog; also hound dawg.
- That dawg won't hunt.
- (slang) Dude, bud, pal. used to address a close male friend.
- Sup, dawg.
- See also Wikisaurus:friend
slang: dude, bud, pal
See also 
Usage notes 
Using this spelling of dog emphasizes dialect and should only be done if this is explicitly intended. Every example above could also be written with dog, de-emphasizing dialect.