Shenanigans. That's four syllables of wonderfulness. Means a playful prank. "She's up to her usual shananigans, I see."
Where'd a word like that come from, you ask? Well, it's obvious. There was once a people who were known far and wide for their wild and crazy behavior. They were known as "the Nanigans." And the women were particularly wild and crazy. They'd were known as, obviously, she-nanigans. And over time it became the word for the behavior.
And now you know.