Where does “胸チラ” come from?

胸チラ (Japanese) comes from Japanese 胸, from Japanese い, from Japanese や, from Japanese じゃ, from Japanese である, from Japanese で, from Japanese ぜ, from Japanese ぞえ.

胸チラ (Japanese): an unexpected exposure of a woman's breasts

Definitions

  1. an unexpected exposure of a woman's breasts

Ancestry of “胸チラ”, step by step

胸チラ traces back through two separate lines of ancestry.

via Japanese

StepLanguageWordMeaning
1Japanesechest, breast; heart, inner thoughts; bosom,...
2JapaneseUsed in compounds with certain sentence-ending...
3Japaneseand/or; is, are; Alternative form of いや
4Japaneseじゃso, then—used for connecting to a reasonable...
5JapaneseであるTo be: the copula, with the same function as だ and its polite form です
6Japaneseat; with, by, using; indicating the following...
7Japanesesentence-ending particle signifying emphasis,...
8Japaneseぞえ­ sentence-ending particle signifying emphasis, used to lightly press one's point, with affectionate overtones
9JapaneseAlternative form of い
10Middle Chinese

via Japanese ちらっと

StepLanguageWordMeaning
1Japaneseちらっとflashingly, glancingly
Every word from Middle Chinese Every word from Japanese Every word from Japanese ぞえ