Figurative meaning
to debug or solve a problem by explaining it line by line, out loud, to an inanimate object such as a rubber duck
Why this phrase?
From The Pragmatic Programmer (1999), which suggests keeping a rubber duck on your desk: explaining your code to the duck forces you to think through it carefully.
Example
“I was stuck on the bug for hours, but five minutes of rubber duck debugging and I spotted my own mistake.”
Additional meanings
Dictionary details
Related idioms
Expressions connected by reviewed component words or topic tags.
water off a duck's back
CEFR B2criticism that has no effect on someone
get your ducks in a row
CEFR C1to organize things carefully before acting
band-aid fix
CEFR B2a hasty, temporary solution that patches a symptom without addressing the root cause
feature creep
CEFR B2the uncontrolled growth of new features until a product becomes bloated and hard to use
quick and dirty
CEFR B2done rapidly and roughly, with little care for quality or polish
silver bullet
CEFR B2a single, simple, magical solution that solves a hard problem completely
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.