1. Cheated, conned, or scammed. A variant spelling of "snookered." Nearly 400,000 people ended up getting shnookered by the company, which stole almost $35 million in total. I couldn't help feeling like I'd been shnookered as I drove off the lot in the second-hand car.
2. slang Drunk. A variant spelling of "snookered." We spent the whole night getting shnookered on cheap vodka, so we had the worst hangovers of our lives the next morning. He was so shnookered he couldn't even say his own name properly.