English Reference

Word

crackers

Phoneticscrack·ers

US/ˈkɹækɝz/

UK/kɹˈækəz/

Definitions

01crazy or insane

B2

adj. acting in a way that is silly, strange, or crazy.

adj. mentally unbalanced, eccentric, or behaving in an irrational manner.

“You must be crackers if you think I am going for a swim in this freezing weather.”

“The neighbors thought he had gone completely crackers when he started building a full-sized replica of a pirate ship in his tiny backyard.”

British English · Informal

Usage

Usually follows a linking verb like 'be' or 'go'.

Teaching tip

This is a very common Britishism; learners should be aware it sounds distinctly UK-centric and is too informal for professional writing.

Antonyms

02dry biscuits

A2 · Cooking

n. thin, dry, and usually salty biscuits that you often eat with cheese.

n. plural form of a thin, crisp, savory wafer or biscuit.

“We served some cheese and crackers as a snack before the main meal started.”

“The host arranged an assortment of artisanal crackers and aged cheddar on a wooden platter for the guests to enjoy during the reception.”

Usage

Countable noun; almost always used in the plural when referring to the food item.

Synonyms

Real-World Examples

“CosmicWatch is roughly the size of a box of animal crackers.”
ScienceDaily · 17 Sept 2026
“Anyone who has experienced dry mouth knows that crackers can feel like sand and swallowing can become surprisingly difficult.”
The Conversation · 3 Aug 2026

Etymology

From cracker + -s. The South African sense is from their sound and its status as a plurale tantum by association with trousers. The adjectival sense derives from British naval expressions referring to firecrackers in one's head, originally as "he's got the crackers" and then "he's gone crackers" before the present "he is crackers".

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

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

Scan code

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English Reference