Back Up The Truck
  
"Give me as much as I can get. And nothing else. I like this stock. I really want to own it. I'm going to back up the truck right now." Not a diverse way to invest. Maybe don't do this if you can't stomach big price moves. A loss would wipe you out. In other words, don't back up the truck.
But if you are gonna back it up in real life, it means that you probably bought the stock at $20, thinking it'd earn $2 a share next year and double. But they guided to $1.80, and the stock went to $16, and then one quarter later they guided down to $1.40...so now, with the stock at $9, you think the era of missed quarters is over, and you want to own tons of this baby. Load every share that'll fit in the truck.