figurative form of speech.
It means If you understand what a person is implying or follow where they're getting at in a conversation.

Usually substituted for the following phrases:
"If you know what I'm saying." or "If you see what I mean."

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

If you understand what i mean/ direction of my thoughts (if you follow my train of thought)

If you get what iam saying