When you have had a heavy night drinking and you and your friends watch a porno, then you get to into and rap your dick in a plastic bag condom and stick it in the hole in the sofa you are lying on.
Zack: 'hey man how did the party go'
Joe: 'man it was wild'
Zack: 'an regrets'
Joe: 'yeah'
Zack: 'what'
joe: ' I fucked a sofa!'
Zack: 'Theres a new slogan DFS (Don't Fuck Sofa's)
1. Short for sofa confusion: the act of spending the night at a girl's place, when you're not sure if you're allowed in bed or expected to spend the night on the sofa. 2. The fusion of two sofas.
Carl ended up at Mary's for the night, and thought he had a good chance for the bed, but sofafusion clouded his thoughts.
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.