English Reference

Word

booby

Phoneticsboo·by

US/ˈbubi/

UK/bˈuːbi/

Definitions

01a seabird

B2 · Science

n. a large tropical seabird that lives near the ocean.

n. any of several species of large tropical seabirds within the family Sulidae, known for their clumsy movement on land.

“We saw a blue-footed booby diving for fish near the cliffs.”

“The naturalist spent months observing the nesting habits of the masked booby on the remote tropical archipelago.”

Synonyms

gannet

03a foolish person

C2

n. a silly or stupid person.

n. a person perceived as foolish, stupid, or clumsy. Often used in the phrase 'booby prize' for the person who finishes last.

“Don't be such a booby and look where you are walking.”

“He felt like a complete booby after tripping over the only obstacle in the empty hall.”

Informal · Archaic

Teaching tip

This sense is becoming dated; modern speakers are more likely to use 'idiot' or 'fool'.

Synonyms

fooldunceidiot

Antonyms

04to set a trap

C1

v. to hide a trap somewhere to surprise or hurt someone.

v. to install a booby trap on or at a location; to rig an object to explode or collapse when touched.

“The kids tried to booby-trap the door with a bucket of water.”

“Retreating forces had booby-trapped the abandoned crates to hinder the enemy's progress.”

Informal

Usage

Usually appears in the compound form 'booby-trap' rather than the bare verb.

Synonyms

Real-World Examples

“Blue-footed boobies, common to Peru and Ecuador, began showing up in large numbers in Panama in early summer.”
The Conversation · 10 Sept 2026
“For millennia, millions of seabirds, including guanay cormorants , Peruvian boobies and pelicans , had nested on rocky outcrops along South America’s arid Pacific coast.”
The Conversation · 27 Jul 2026

Etymology

17th century. From Spanish bobo, from Latin balbus (“stammering”). (bird): Compare typologically Translingual Morus, German Tölpel, Polish głuptak (akin to głupek), Russian о́луша (óluša) (akin to о́лух (ólux)).

From the earlier form bubby.

From boob + -y.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

boobNounboobyNoun

Idioms

booby prize — A prize or status, often unwelcome, awarded as a joke or disincentive to the loser of a contest or for poor performance.

This entry

Level
C2 · Proficiency
Frequency
Occasional
Updated

Scan code

englishreference.com/q/booby

English Reference