Testing a system or an Application on the fly, i.e just few 
tests here and there to ensure the system or an application 
does not crash out.

Performing Abnormal actions intentionally on an 
application, to check the stability  of it.

Due to lack of time the test engg are jumped sOMe test 
cases in test execution time that is called Monkey testing.

Randomly entering keyboard inputs on a application like a 
monkey is called monkey testing

Without following application flow,testers will test the 
application is called the monkey testing

Due to Lack of time ,testing team is conducting the test on 
specific area (or) main modules (or )basic functionalities 
of the application build.This is also called as chimpanzee 
(or) gorilla testing.

Monker testing is a random testing performed by automated 
testing tools.These automated testing tools are considered 
Monkeys,if they work at random.

Monkey testing is to test the sofware application without
writing the test cases.

Monkey testing is also called as adhoc testing or random
testing.