What is Yarmulke?
1.
A small cloth circle worn on the head by orthodox jews (only men, usually) as sort of a way to show respect and reverence to their God and let everyone else around them know that they are orthodox jews
Put on your yarmulke before you go into temple
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2.
A beanie worn by Jewish men to protect their souls from being stolen by Catholics.
Yarmulke is a tin foil hat, only it works against other religions, not the government.
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3.
Protective head gear worn by honorary jews
<a jew ponders>
"Should i wear my yarmulke under my baseball hat or over it"