Snarkling can involve your aquatic bum-bubbles or those of someone else.
Caitlin was snarkling yesterday, it was just wrong.
"It wasn't me bro! It was the Snarkle!"
Other common pranks include: putting salt in the sugar containers and vice-versa, eating all your cookies without your consent, tying you to your bed while you sleep, and putting anti-freeze in your drinks so you have violent seizures followed by paralysis and eventual kidney failure which almost always proves to be fatal as well as extremely painful.