I'm on my ish, call it
CG says an elongated “ish” to make the sound the heart monitor makes when someone dies. “Call it,” is the doctor telling the nurse to declare a patient dead and give a time of death. He’s going to kill this track, from the start you might as well just call it.
“Ish” is also part of his name (Childish Gambino), which could be a forewarning for him about to go childISH on this track. And of course, “ish” is also a term for “shit”, and CG is on his ish.
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