In bangladeshi it is a word to describe a person who is the laughing stock of others. The word literally means "tool" in bangladeshi. In textbooks the term originated from a peasant who thought smoking hashish was cool until he was sent to jail for raping a thirteen year old hermaphodite.
A: Man I thought that guy was aight but shit man.
A: He a Senesh you know what I'm saying?
B: Yeah I feel you; he basically a fuckwit. Right?
A: Exacto Emundo Nesse.