Dropper

Remove the cap from the ink refill bottle, fill the dropper with ink, and drip an appropriate amount onto the marker's core.

I wish I was full-blooded Scottish instead of just an eye dropper full. Then I could get my full indignation on.

'Cause when the blood begins to flow When it shoots up the dropper's neck[…]

The dropper left the suitcase with the bomb next to the garbage can.

The child with the letter runs around the outside of the ring, repeating the words over and over again, and at one point drops the letter behind one of the players, who must pick it up and chase the dropper.

Thus an American police chief discussing the 'cheque-droppers', then peculiar to his side of the Atlantic, who were taking a toll estimated at […] Over the years, forgery has tended to be an amateur operation — a crime of opportunity.

[…] 'dropper' — the person who presents the cheque at the bank or elsewhere — who takes the risk. […] On the other hand, 'kite droppers' usually work in teams.