der Spritzer
splash / splatter
A small amount of liquid that is spread by quick pressure or impact.
Ich habe ein paar Farbspritzer auf meiner Hose.
I have a few paint splatters on my pants.

splash / spritzer
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splash / splatter
A small amount of liquid that is spread by quick pressure or impact.
Ich habe ein paar Farbspritzer auf meiner Hose.
I have a few paint splatters on my pants.

The noun 'der Spritzer' (splash/spritzer) is derived directly from the verb 'spritzen' (to spray/splash). It describes the result of this action: a small amount of liquid that has been sprayed or splashed somewhere.
Beim Öffnen der Flasche gab es einen lauten Knall und einen Spritzer Sekt.
When the bottle was opened, there was a loud pop and a splash of sparkling wine.
In the sense of a mixed drink made from wine and mineral water, 'der Spritzer' (spritzer) is mainly used in Austria. There, it is a very popular everyday drink.
Im Heurigen bestellte sie einen weißen Spritzer.
At the wine tavern, she ordered a white spritzer.
In this meaning, 'Spritzer' (splash/splatter) often describes a small, unwanted amount of liquid caused by an accident or a careless movement. Typical examples are paint splatters on clothing or mud splashes on a car.
Nach dem Streichen hatte er überall kleine weiße Spritzer im Haar.
After painting, he had small white splatters all over his hair.
When it comes to refining foods or drinks, 'Spritzer' (splash/dash) is almost always used in the fixed phrase 'ein Spritzer [Zutat]' (a splash/dash of [ingredient]). Common ingredients are lemon, lime, vinegar, or even an alcoholic drink.
Gib einen Spritzer Essig in den Salat, das rundet den Geschmack ab.
Add a splash of vinegar to the salad; it rounds out the flavor.
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'Schuss' and 'Spritzer' can both mean a small amount of liquid. 'Ein Schuss' is a small amount that you intentionally add to something, often when cooking or in drinks. 'Ein Spritzer' can also be a small amount used as an ingredient, for example lemon juice. But it can also mean a small amount of liquid that lands somewhere because of pressure or impact, such as a splash of water on clothing. The words are easy to confuse because both are used with liquids. For an intentionally added amount, both are sometimes possible; for stains or splashed liquid, 'Spritzer' fits better.

Beim Abwaschen bekam Tom einen Spritzer Wasser auf die Brille.
While washing the dishes, Tom got a splash of water on his glasses.
Mein Nachbar gibt einen Schuss Essig in den Salat.
My neighbor adds a dash of vinegar to the salad.