Nothing, Zero, Nada... Used almostly when bragging about not paying for a service or something.
It can also be used as an insult for saying someone is broke.
eg 1. I no get shishi for my phone but MTN allow me make call.
eg 2. Emeka no get shishi for pocket.
Twenty 20 naira bill, Nigerian Currency
Oboy pass me the shandy biscuit
["twenty naira", " twenty", " 20"]
Origin: Port Harcourt