The word "squirt" means to forcefully release a small amount of liquid through a narrow opening or to describe a small amount of liquid released in this manner. Full definition
For shaving your underarms and legs, add about a couple of squirts of Castile soap to a cup of warm water. (microabode.com)
Cyanide fishing, whereby divers crush cyanide tablets into plastic squirt bottles of sea water and puff the solution to stun and capture live coral reef fish, is widely practiced throughout Southeast Asia despite being illegal in most countries of the region. (scientificamerican.com)
Space rockets work in a similar way to the bottle, but instead of squirting water they burn fuel to make a powerful jet of hot gas. (science-sparks.com)