Peko-chan Tongue

In Japanese, Peko-jita ペコ舌, literally the "tongue," shita 舌, of Peko, refers to drawing characters with a tongue sticking out at the corner, and sometimes with eyelashes, resembling or parodying the iconic candy character Peko-chan ペコちゃん.^{(dic.pixiv.net)}

The word shita した becomes jita じた as a suffix due to rendaku 連濁.

Character: Nyaruko ニャル子
Anime: Haiyore! Nyaruko-san 這いよれ！ニャル子さん (Episode 7)

• ペコちゃん
• Examples
• References

ペコちゃん

For reference, this is what the mascot character Peko-chan ペコちゃん, from Fujiya 不二家 co. ltd. looks like:

Character: Peko-chan ペコちゃん
Source: 7粒ミルキー - fujiya-peko.co.jp, accessed 2020-03-10

• Milky is a brand of candy.

Examples

Sometimes, this iconic tongue is used to parody the brand in anime.

Character: Hachikuji Mayoi 八九寺真宵
Anime: Nisemonogatari 偽物語 (Episode 1)

Anime: Inu x Boku SS, 妖狐×僕ＳＳ (Episode 5)

• Context: a van driver offers free candy to a little girl.

Top-left: Persephone II, ペルセポネ2世
Bottom-Right: a parody of Peko-chan ペコちゃん
Anime: Jashin-chan Dropkick', 邪神ちゃんドロップキック’ (Season 2) (Episode 4)

• Context: Persephone II gets sweets from of a brand called Fujike 不死家, literally "un-dying (i.e. immortal) family," a wordplay on Fujiya using a different kanji read the same way, and a different reading of a same kanji.

Sometimes, the style is parodied in characters doing a tehe pero てへぺろ. For example:

Character: Vignette ヴィネット
Character: Oreki Houtarou 折木奉太郎
Anime: Gabriel DropOut, ガヴリールドロップアウト (Episode 9)

References

• ペコ舌 - dic.pixiv.net, accessed 2020-03-25.