ぐずぐず
愚図愚図
guzuguzu

Suru Verb
To-Adverb

1. slowly; tardily; dawdling; lingering; hesitantly

Onomatopoeia
Usually Written in Kana
なんをぐずぐずしてるの?
nanio guzuguzu shiteruno
What's taking you so long?
Adverb

2. complaining; grumbling

Onomatopoeia
Usually Written in Kana
あいつはいつもぐずぐず文句もんくばかりっている。
aitsuwa itsumo guzuguzu monkubakari itte iru.
He is complaining about something or other all the time.
Adverb
Suru Verb

3. unsettled (e.g. weather)

Onomatopoeia
Usually Written in Kana
na-Adjective

4. loose; slackened

Onomatopoeia
Usually Written in Kana