Dude 1: I thought I was going to ace that math exam but I totally hillaried it.
Dude 2: That's your problem, you were so confident, you didn't study. So of course you were hillaried.
The act of something being swept under the rug with everyone watching and pretending it didn't happen by both parties except a third
Tom and Stephanie totally Hillaried last weekend when her bf Ron caught them fucking in his jeep, they still claim they were searching for her cell phone