Droppers are clothes hangers that actually drop all your clothes. You hang your prized frock, shirt or leather thongs up - only to find them on the closet floor.
'Droppers' are an example of the stealthtechnology employed by manufacturers of blood pressure treating drugs to increase demand for their product.
Tommy drew on the desk, the teacher talks to all of the class and asks who did it and says at the end of the day they can see them and tell the information. A dropper would be the one who told on Tommy.
A person who is generally bad at catching things, or even just holding things without dropping them.
Three friends have been playing throw-and-catch with a ball.
Friend 4: hey, throw it to me bro
Friend 1: sure!
Friend 3: WAIT don’t do it Friend 1: what??
Friend 3: He’s a dropper
Friend 1 and 2: Ahhhhhh good call