To light your cigarette (smoke) from another persons cigarette - usually from a close friend or family member. This is only carried out when a lighter is not immediately available.
Shortened version of the backstage expression "That looked like a monkey fucking a football" -- i.e. "Oh, wow, that was so godawful awkward and stupid that I had to stare at it." Among stage crew and roadies, a monkey fuck is not just any mistake or accident. It's something that you couldn't possibly avoid that forces you to look really stupid in front of a large audience.
"I hear load-in took a while."
"Oh, shit, they got us carts but they were two inches too wide for the passageway, and they only gave us half a crew because we had carts, and the band just got these new super expensive amps, so we had to hand carry them and not bump or drop them, and then the loading dock door jammed so we were carrying them through the front lobby, four house guys on an amp, all bent over like hunchbacks, with a roadie following us and screaming to be careful, and everyone in line buying tickets laughing at us. It was a total monkey fuck."