What is slinger type lubrication?

If you're talking about a small engine such as a mower or minibike would have, That would be a device called a splash gear. It's usuall very lightweight and off-center of the crank and dips into the crank case oil to splash or sling it into the cylinder walls and other internal moving parts. The splash gear is less common than the traditional oil pump systems that ... well... pump the oil.