nick-name or shortened version of "samantha". Often thought to be created by the parents and extremely annoying when heard often.
hey, mantha! come eat your dinner!
a mantha is derived from the name samantha bacci, its when a girl gives a coloured person a fat, juicy blowjob and loves it taking advantage of the abnormally large size of the coloured persons penis
i gave that guy the greatest mantha in my life last night. thats why i love coming to Jamaica