Example
“The empty error log was a red herring — the real bug was in the config.”
Dictionary details
Related idioms
Expressions connected by reviewed component words or topic tags.
red flag
CEFR B1a warning sign that something is wrong
Neutral
red ocean
CEFR C1a crowded, hyper-competitive market where rivals fight over existing demand
Neutral
straw man
CEFR C1a weak, exaggerated version of an opponent's argument set up to be easily knocked down
Neutral
brain power
CEFR B1intelligence or mental ability used to think and solve problems
Informal
let the cat out of the bag
CEFR B1To reveal a secret, usually by mistake.
Informal
pull someone's leg
CEFR B1To tease or joke with someone by telling them something untrue in fun.
Informal
Source methodology
Meanings, register, CEFR, and examples come from the reviewed dictionary record. Expression notes may describe a reviewed present-day word picture or a background note; they are not presented as verified etymology.