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(n.) A pest-bug with an ability to rebound from danger, and famous for being a sign of a dirty house, and being able to withstand a nuclear war.

Similarly, it can refer to an annoying human who seems to be indestructable, yet annoying to those who don't have the ability to annoy themselves.
Dis man, he is a cock-a-roach.
by Kung-Fu Jesus May 12, 2004
1. A vile, evil little bastard excuse of a bug
2. Someone who is cocky all the time
1. AAAUUUGHH! theres that fucking cockroach again!
2. Dude stop being a cockroach theres no way she`ll go out with you
by blu3hat + S1appy December 30, 2010
A derogatory term used to describe individuals with poor credit.
Walter the broker: Can they get a loan?
Jack the salesman: No, they have had multiple chargeoffs and a bankrupcy; damned cockroahes.
by Shahin January 31, 2005
An illegal mexican because they flee like cockroaches when the light is turned on them as they sneak across the border.
Walmart got sued by a bunch of cockroaches after they were discovered by immigration officials.
by jype August 03, 2008
Referring to two similar species of freshwater fish; both of which originate from the common roach variety. Each breed can be identified as follows:

Long Wang :- A roach which has genitals similar in size and shape to a fully grown human male.
Cockbody :- A roach whose body itself looks similar to a human penis.
Lad 1: Hey, there's a vibrating dildo in your fishing basket.
Lad 2: Nah, that's just the cockroach I caught earlier.
by Campeh February 28, 2008
A car buyer with terrible credit. Someone who never pays their bills. A person who thinks they can buy a new or used car even though they have very bad credit.
He can’t buy this car without a co-signer and a huge down payment because he’s a stinking (Cock) Roach who just had a repo last month!
by Cal Worthington August 20, 2005
A promiscuous man that lurks in clubs. He is probably the hottest guy there, but he has deplorable hygiene and he's probably got STDs. He's also the only guy in the club clever enough to wear eyeliner.
-That guy over there is so choice, I've got to meet him. Oh, wait, he looks like a cockroach.

-He's such a cockroach, I heard he has AIDs. Too bad, I love a guy in leather.
by ladycreeper June 19, 2014
A bandwagon Cowboys fan from somewhere other than the Dallas area.
After the Cowboys won their first game, I saw two cockroaches at the store wearing their Cowboys jackets.
by i hate dallas September 22, 2009