What does roach mean?
“Roach” is a versatile English word with several distinct meanings. In British English and some regional American varieties, it is the common name for a small freshwater fish belonging to the carp family. Informally, especially in American English, “roach” can mean a cockroach, and it may also refer to the stub of a cigarette that has been smoked. As a verb, “roach” means to flee or run away, usually because of fear or panic. The word is therefore useful for recognizing both ordinary regional vocabulary and informal slang. Its meanings range from the everyday and concrete to distinctly colloquial, so context is important: a person fishing by a river may be referring to the fish, while someone describing a sudden escape may be using the verb.
A small freshwater fish of the carp family; informally, a cockroach; or a cigarette butt.
"They caught several roach from the lake before the weather turned cold."
The fish sense is standard in British English and regional in American English; the cockroach and cigarette-butt senses are informal.
To flee or run away, especially in fear or panic.
"The boys roached when they heard the principal approaching."
Informal and chiefly American; it is not normally used in formal writing.
The standard plural is “roaches.”
"Several roaches were hiding behind the stove."
The same word can name a fish, a cockroach, and the act of running away—an unusually versatile piece of informal English.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does roach come from?
The name of the fish comes from Old English rōc, an old word for a freshwater fish. The modern meanings for a cockroach, a cigarette butt, and the act of fleeing developed later as informal uses. The precise historical relationship between the fish name and the word “cockroach” is uncertain, and popular explanations of that connection should be treated cautiously.
How roach is actually used
The fish sense is standard in British English and is also used in some regional varieties of American English. “Roach” for a cockroach and the verb “roach” are informal and are most characteristic of American speech.