The Zain Test, locally originated in Durban, South Africa in the early 2000's by a group of school kids. Named after one of the guys in the group. It is the test of fidelity and loyalty of a guy's female partner.
Traditionally, a guy would ask another guy (The Zain of his friends), ie: the most charming or persuasive and successful in seducing women, to test his Girlfriend to see how faithful she is to said guy.
It has evolved since then and can also be a test to measure the promiscuity of a woman.
It is rare to come across a Zaintara in your life, he or she is the most patient, loving and supportive person in your life. A Zaintara would literally sacrifice Their self for the people that it loves and if you make a Zaintara mad it's going to be very scary fighting him or her alone. He or she is never going to give up as long as their body can still move....
An example is pointless go find a Zaintara to experience the whole thing.