Example
Dictionary details
Related idioms
Expressions connected by reviewed component words or topic tags.
bad news
CEFR A2an unpleasant piece of information; (informal) a person or thing likely to cause trouble
can of worms
CEFR B1a complicated problem that causes trouble the moment it is touched
get out of hand
CEFR B1To become impossible to control.
red flag
CEFR B1a warning sign that something is wrong
the writing on the wall
CEFR B1clear and unmistakable signs that failure or disaster is coming
wake-up call
CEFR B1an event that forces you to realize a problem you were ignoring
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.