nootropic adjective, noun pertaining to a drug that enhances mental functions, such as memory Word Origin Greek noos 'mind' + -tropic 'affecting' Sometimes I look a little strung out. It's usually just caffeine. One of my earliest memories is of my mom handing me a can of Mountain Dew. It started out so innocent. She unwittingly created a monster. Red Bull, Rockstar, Monster, 5-hour ENERGY, coffee, espresso, Stay Awake, Jolt Energy Gum -- GIVE IT TO ME! I crave the cracked ou