A euphemism for when you can't say "cocksucker(s)." Typically used around mixed company or elder relatives you don't want to offend. Originates from Rooster (cock) and a suckerfish. Useful because the same word can apply to singular or plural targets.
"Did you hear what Jeff did yesterday?"
"No, what?"
"He went up to a guy in a wheelchair and started skipping around him, and then ran off."
<easily offended person walks into the room>
"What a roosterfish!"
<Reading mail with company over, IRS says you have to pay in this year>
"Roosterfish!"
An epic weekend celebrated by girls only who consume large amounts of alcohol while dressing in bohemian clothing who have agreed to "Fight Club" rules. Also known as a weekend getaway.