show lettuce

The result of a professional athlete getting a big head and growing his hair out cause he thinks he's so cooler than he is. When u make it to the big leagues they call it "The Show." Players refer to hair as lettuce. Hence Show Lettuce.

"Damn, look at Bryce Harper sportin that show lettuce! Better put some mayonnaise on that show lettuce rookie!"

Show Lettuce

The lettuce or kale that lines the bottom of a dish to protect food from touching a serving tray or ornate platter. Usually seen at a buffet or party trays.

"Jill don't eat that, it's gross, it's just show lettuce"