Is your mind firmly in the gutter? Good.
Here we go.
The name Pearl Jam was around long before the band. What is pearl jam then? Watch a coupla' p0rn movies and you'll figure it out.
It's an iridescent, gooey substance that is best not talked about around young'uns for the easily embarassed. If you have no idea what I'm talking about, ask the male next to you. After he finishes blushing, he may explain.
And please, please, please, don't go down to the corner market and ask for "A big bottle of pearl jam". Trust me on this one.