An activity or past time popularized in toronto. Similar to cow tipping, but instead you sneak up behind a nipper (asian) that is fishing and you tip them into the water!
"Hey news is going nuts from all the nipper-tipping cases by lake ontario"
"I'm so bored what do you say we go nipper-tipping"
"I'm so bored what do you say we go nipper-tipping"
by Sargon D October 09, 2007