Mertha

mertha is the non-sensical term made up by non-Jamaicans and confused for the word "murda" in the popular reggae song World a Reggae by Ini Kamoze. The term has nothing to do with anything Jamaican. It is used by non-Jamaicans to apply to the feeling you get when smoking the ganja and listening to reggae.

Ini Kamoze himself said the word in the song is murder.

What di rass is Mertha? Mi nuh know bredda. Must be sumting weh di Yankee ute dem come up wid.