foobar

/ˈfuːˌbɑː(ɹ)/

//ˈfuːˌbɑː(ɹ)// noun

"foobar" is a 6-letter English headword indexed on PlainSpell.

The verdict

“foobar” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
6
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A serious mistake.

Corpus desk

Index EN-foobar · foobar · English

foobar · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 6 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "F" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for foobar
PropertyValue
Headwordfoobar
LanguageEnglish
Part of speechNoun
IPA/ˈfuːˌbɑː(ɹ)/
Letters6
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “foobar” in English

foobarranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

foobar is uncommon English outside the top frequency list, classed as anoun, transcribed /ˈfuːˌbɑː(ɹ)/. Rarity is why readers land here mid-draft. 2 senses are on record.

Zero misspellings are on record for foobar in our index, since its letter sequence doesn't invite the usual edit-distance slips. This entry stands alone in our confusable dataset, since nothing in our dataset looks or sounds close enough to cause mix-ups.

Etymologically, the entry records: Phonetic spelling of FUBAR, which is either an acronym for "fucked up beyond all recognition", or derived from foo. The correct English form is foobar, spelled F-O-O-B-A-R.

Definition

  1. 1
    A serious mistake.
  2. 2
    A metasyntactic variable name, a place holder for words; compare foo, bar.

Etymology

Phonetic spelling of FUBAR, which is either an acronym for "fucked up beyond all recognition", or derived from foo.

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "foobar"?
"foobar" is spelled F-O-O-B-A-R. The IPA pronunciation is /ˈfuːˌbɑː(ɹ)/.
What does "foobar" mean?
As a noun, "foobar" means: A serious mistake.
How do you pronounce "foobar"?
The IPA (International Phonetic Alphabet) transcription for "foobar" is /ˈfuːˌbɑː(ɹ)/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "foobar"?
Phonetic spelling of FUBAR, which is either an acronym for "fucked up beyond all recognition", or derived from foo. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list