Noogie: Rubbing Knuckles Against Someone's Head (atama guri-guri 頭ぐりぐり)

In anime, sometimes a character rubs their knuckles against another's head to punish them. In English, this is called a "noogie."^{(merriam-webster.com:noogie)}

See head pat for the softer sort of head rubbing.

Left: Nohara Misae 野原みさえ
Right: Nohara Shinnosuke 野原新の助
Anime: Crayon Shin-chan, クレヨンしんちゃん (Episode 1)

How to Say in Japanese

To say "noogie" in Japanese:^{(weblio.jp:noogie)}

atama wo kobushi de guri-guri suru
頭を拳でぐりぐりする
To do guri-guri on [someone's] head using [your] fists. (literally.)
To rub your knuckles against someone's head.
atama guri-guri
頭ぐりぐり
Noogie. The act of guri-guri'ng someone's atama.
guri-guri
ぐりぐり
A small but forceful swirling, spinning movement.
(mimetic word.)

Yuno ゆの, example of guriguri-me グリグリ目, "swirling eyes."

Anime: Hidamari Sketch, ひだまりスケッチ (Episode 1)

guriguri-me
ぐりぐり目
A term for this sort of swirling eye.

It's also known as:^{(dic.pixiv.net:グリグリ攻撃)}

guriguri kougeki
グリグリ攻撃
guriguri attack.
- Specially used in Crayon Shin-chan, with Misae punishing Shinnosuke, giving it an image that adults use this technique to punish misbehaving children.

umeboshi
ウメボシ
Pickled dried plum.
- Possibly because placing umeboshi on the temples (where you put knuckles in this attack) is a remedy for headache in folk medicine.^{(dic.pixiv.net:ウメボシ)}