Catchphrase

A catchphrase is commonly uttered line uttered by a character. Catchphrases often become associated with the character in question and if they become popular enough may even become associated with the show.

The two most known catchphrases on Futurama are Farnsworth's "Good news, everyone" and Bender's "Bite my shiny metal ass".

Catchphrases
Catchphrases used by the characters

Dr. John A. Zoidberg

 * Woop-woop-woop-woop! - Dr. Zoidberg
 * Hello! - Zoidberg
 * What an honour! - Zoidberg
 * Excellent, excellent! - Zoidberg
 * (Insert famous person)? I love that guy! - Zoidberg
 * Hooray! - Zoidberg
 * I'll take eight! - Zoidberg
 * Dibs on...! - Zoidberg
 * Awwww... - Zoidberg

Bender Bending Rodríguez

 * Bite my shiny metal ass - Bender
 * Me, Bender - Bender
 * We're boned - Bender
 * Bender is great - Bender
 * Cheese it! - Bender
 * It's gonna be fun on the bun! - Bender (Apparently this catchphrase was briefly deleted from him during the events of "Overclockwise".)
 * Do the Bender! - Bender
 * Hoo-hoo-hoo-hoo-he-he-he-he-he-he! - Bender

Professor Hubert J. Farnsworth

 * Good news, everyone - Professor Farnsworth
 * I am already in my pajamas - Professor Farnsworth
 * Sweet Zombie Jesus! - Professor Farnsworth
 * Huh? - Professor Farnsworth
 * Wernstrom! - Professor Farnsworth

Philip J. Fry

 * Help! Police! - Fry
 * He's dead
 * OW! My (insert body part)! - Fry

Turanga Leela

 * Hi-yah! - Leela
 * Oh, Lord - Leela

The Conrad family

 * Sweet (insert animal or thing) of (insert place)! - Hermes and LaBarbara
 * My Manwich! - Hermes, Dwight and LaBarbara

Others

 * Guh/buh/spluh/fluh - Amy
 * That's prepostrous! - Cubert
 * Well gadzooks! - Enos Fry
 * My kajigger(s)! - Hattie McDoogal
 * Watchacallit - Hattie McDoogal
 * (sigh) - Kif
 * I am Lrrr, ruler of the planet Omicron Persei 8! - Lrrr
 * Lrrr... - Ndnd
 * Haroo! - Richard Nixon's head
 * Ha-Haaaa! - Roberto
 * Whoahs! - Sal
 * I'm Scruffy, the Janitor. - Scruffy
 * Leela... - Zapp Brannigan