to twitch

非公式: informal, unofficial, private

非公式: being unofficial, informality

氷上: a surname

"to pull the chin": to fix one's posture, notably by moving one's head backwards (and not literally drawing in one's chin as if nodding)

to have a long, trailing portion

to pull the strings (control behind the scenes) / to create strands / to draw a line

(Chūgoku, Shikoku, Kyūshū) because, since, so: presents the preceding clause as the reason for the following clause

three

(Internet slang) Alternative spelling of さん (san)