A combination of the words frat and slut, the word frut refers to any girl who has had sexual contact with 3 or more brothers from the same frat. Usually a frut will have some sort of physical defect such as nasty teeth, sagging boobs, a muffin top, scraggly hair (usually dyed a platinum shade of blonde with pitch black roots), or an inverted butt. You may be able to spot a frut at frat parties. Just look for the girl who has had the same cup with the same amount of alcohol in it the entire time, yet still is giggling wildly and thrusting herself sloppily all over her boys. Fruts dont seem to understand that the frat brothers are not their real friends and most of the time the brothers even make fun of her behind her back. Occasionally, even the nicest girl can be caught acting frutty.