ぶーぶー

ぶーぶー
adverb, noun
honking; oinking; complaining
1. honking sound; car horn
The sound of a car horn or similar noise. Also used as baby talk for 'car.'
(くるま)がぶーぶー()っている。
The car is honking.
ぶーぶーがきたよ。
A car is coming!
Baby talk for car
(あか)ちゃんが「ぶーぶー」と()って(くるま)(ゆび)さした。
The baby said "vroom vroom" and pointed at the car.
2. oinking; pig sound
The sound a pig makes.
(ぶた)さんはぶーぶー()くよ。
Piggies go oink oink.
牧場(ぼくじょう)(ぶた)がぶーぶー()いていた。
The pigs were oinking at the farm.
子供(こども)たちが「ぶーぶー」と(ぶた)真似(まね)をして(あそ)んでいる。
The kids are playing by imitating pigs, going 'oink oink.'
3. complaining; grumbling
The action of complaining or expressing dissatisfaction repeatedly.
ぶーぶー文句(もんく)()うな。
Stop complaining.
彼女(かのじょ)はいつもぶーぶー()っている。
She's always complaining about something.
給料(きゅうりょう)(やす)いとぶーぶー文句(もんく)()社員(しゃいん)(おお)い。
There are many employees who grumble about the low salary.

ぶーぶー is an onomatopoeic word with three distinct uses depending on context.

SOUND/BABY TALK:

  • ぶーぶー as a noun means "car" in baby talk, similar to English "vroom vroom"
  • ぶーぶーに()る: to ride in the car (child's speech)
  • Also represents the sound of a car horn honking

ANIMAL SOUND:
Represents the oinking sound of a pig. Used in children's stories and when imitating animal sounds.

COMPLAINING:

  • ぶーぶー()う: to grumble, to complain
  • ぶーぶー文句(もんく)()う: to whine and complain
  • Casual/informal expression implying petty or persistent complaining

RELATED ONOMATOPOEIA:

  • ワンワン: dog bark (also baby talk for "dog")
  • ニャーニャー: cat meow
  • モーモー: cow moo

NOTE:
Many Japanese onomatopoeia for animal sounds double as baby-talk nouns for the animals themselves: ワンワン (doggy), ニャーニャー (kitty).