An acronym that stands for 'wild, unprotected sex.' It can be used in everyday speech, but is preferred among instant messaging or social networking sites.
1. Marc - "Nathan wanted to have WUS with me last night!"
2. Meredith - "I heard that Sarah was so hammered last week, she had WUS! And this morning she found out she was pregnant!"
Renée - "Quick! You grab a coat hanger and two Excedrin - I'll grab Sarah."