The little tent made from bed sheets by the hard-on of a guy lying on his back underneath them. This is most commonly associated with adolescent males experiencing erotic dreams that often result in nocturnal emissions, but ANY male capable of an erection can "put up a meat tent" while in bed.
The other night I had a hotdream about my wife and woke up with a giant meat tent going on. I mean, it was like the big top! You could've had a circus in there!
A girl who is trying to get your attention and flashes her massive clam at you then you realize that its so huge that camel toe or moose knuckle is way to small to call this thing but then realize its as big as a circus tent so you call it a meat tent.
She was being sexy doing a dance and showed me her clit and boy its so big it could be a meat tent.