Possible Clues:

• 'Ya dig?'
• 'You picking up what I'm putting down?'
• 'Ya get my drift?'
• 'Get what I'm sayin'?'
• 'Get what I'm saying?'
• 'Get what I'm talkin' about?'
• “Know what I mean?”
• 'Ya dig?,' in more modern slang
• “Get what I’m saying?”
• 'Understand?,' slangily