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.