A small, quick stream of liquid that is forced out of a narrow opening. A squirt of water hit me in the face as I turned on the hose.
A small amount of liquid that is ejected in a quick burst. He added a squirt of lemon juice to the salad dressing.
A young or insignificant person, often used in a dismissive or affectionate manner. The little squirt managed to climb the tree all by himself.