The verb "ism" comes from the word autism, which is a brain development disorder that presents the person with the difficulty to communicate with others, thus the person preoccupies himself with objects on a long period of time. Isming means doing the same action over and over, repeating it without getting bored from it.
I am isming on T.V.
During the summer vacation i used to ism on T.V . for 12 hours straight.
Sorry, i was isming on the game, i forgot to call you!
I ismed on painting for 5 hours today, so i got to finish my masterpiece.