1. A large amount of a certain thing. 2. A mound of people all having intercourse with each other.
1. "Hey man, I've got a fuck mountain of blow, let's go get high and fire shiny guns are cop cars!" or "I just got back from holiday and I've got a fuck mountain of work to do." 2. "I was at this party man... it was kinda creepy. There were all these people around me looking at me funny. I thought I'd bail the fuck out of there and I was trying to find the escape. I went into some back room and I saw... just a pile of guys and gals going at it. It was like a fuck MOUNTAIN dawg