what is adhoc in testing code example

Example: what is adhoc testing

Ad-hoc testing is quite opposite to the
formal testing. It is an very informal 
testing type. In Adhoc testing, we are
randomly test the application without
following any documents and test design techniques.
This testing is primarily performed if
the knowledge of testers in the application
under test is very high. We as tester randomly
test the application without any test cases
or any business requirement document.