Taking or Giving a little bit of something. Also, Going down a
little, (and coming back). This word goes back at least to
60's slang. I suggest it is slang from the word,
dip.
"I've been dippin snuff all
day."
"Ezra is dippin in on this conversation."
We've been dippin the story with a touch of
truth.
That kid thinks all it takes to be
cool is a little dippin in your walk.