The termused when shananagans are being performed, or had.
When a person or persons are doing things which are considered relatively annoying or innapropriate.
Man, I've had about enough of Alice's shananaganry, she's been putting limes in everyones cokes ALL night!
Hey, you youngsters, stop with all the shananaganry or I'll call the cops!
The act of shenaningans, or complete jackassery on another's part.
Bill: What happened, man? Why were you late?
Ted: I locked my keys in my car. Then the asshole who came to unlock my car broke the door. It took 3 hours to fix.
Bill: Complete shenaniganery.