guruguru ぐるぐる

In Japanese, guruguru ぐるぐる means "swirling" or "spinning." It's a mimetic word featuring reduplication, generally used as an adverb to refer to something that's done by swirling around, or looks like it swirls around.

Manga: Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita スライム倒して300年、知らないうちにレベルMAXになってました (Chapter 1, レベルＭＡＸになっていた)

• Context: an angel is granting any desires to a soul about to be reincarnated.
• jaa furou-fushi ni shite-kudasai
  じゃあ不老不死にしてください
  Then, please make [me] immortal.
  • furou-fushi
    不老不死
    Non-aging, non-dying. (yojijukugo 四字熟語)
    Perpetually young and immortal.
  • ~ni suru
    ～にする
    To make something somehow. To turn something into something else. (among other meanings.)
• waku
  わく
  *excited* (psychomime)
• hai!
  はい！
  Okay!
• don
  ドン
  *bam*
• {sonna assari dekiru} mono nanoka
  そんなあっさりできるものなのか
  It's something [that] {can be done so easily}?
• subarashii
  素晴らしい
  Marvelous.
• dewa karada no naka wo mana ga guruguru guruguru junkan shite {{oiru} koto no nai} karada ni itashimashou!
  では体の中をマナがぐるぐるぐるぐる循環して老いることのない体にいたしましょう！
  Then, let's make the mana circulate around and around through inside of [your] body, and turn [it] into a body [that] {never {ages}}.
  • wo を particle - marks the medium through which movement happens.
  • mana
    マナ
    Common term for magical energy in role-playing games. Also known as MP, magic points, magic power.
  • oiru
    老いる
    To age. To grow old.
  • ~koto ga nai
    ～ことがない
    To never [do something]. (to never age).
  • ~koto no nai
    ～ことのない
    (same as above, see: no の subject marker.)
  • ~ni itashimasu
    ～にいたします
    (humble variant of ~ni suru.)
• guruguru
  ぐるぐる
  *swirling motion*
• hoka niwa?
  他には？
  [Anything else]?

Eyes

In anime, guruguru-me ぐるぐる目 refers to the spiral-shaped, sometimes spinning, eyes that character feature when they're dizzy.

Anime: Mahoujin Guruguru 魔法陣グルグル (2017) (Episode 2, Altered)