Male dog of eight years emitted a nasty odor when angry.?

I am babysitting my boyfriends weimaraner dog. he is eight years old and today he was hanging out in my room with me and the cat was under the bed and i did not know this. they started to fight and run around my room and when they were done i noticed that there was a clear fluid everywhere that REIKED. this wasn't a urine smell and i doubt it was the cat. The dog was furious. My room STILL smells. what is this?