orz if you plz
ギンギンに is a opposite term for "very sleepy". For example, when your eyes are clearly opened and you can't sleep despite of nighttime, you say 目がギンギンに冴えて眠れない. Another example: 昨夜のパーティは朝までギンギンに盛り上がった。In this situation, it means "energetically".
チラリズム is a combination term of チラリ (glimpse) and イズム(-ism).
French thinker Roland Barthes elaborated, "It is intermittence, as psychoanalysis has so rightly stated, which is erotic: the intermittence [for example] of skin flashing between two articles of clothing (trousers and sweater), between two edges (the open-necked shirt, the glove and the sleeve); it is this flash itself which seduces, or rather: the stage of an appearance-as-disappearance."
チラリズム describes such kind of aesthetics, in most cases erotic aesthetics, that Japanese have been loving for hundreds years. After all, panty flashing is seductive because it's "flashing".
mashi usually is like "this is better"
like "konshuu no hanashi wa zenkai yori mashi da" or something like that
though perhaps a Real Japanese should verify
As alredy >>412 said, マシ is "better." It often (not always) implys the speaker's reluctant feeling. For example "そのほうがマシだ" usually sounds "It is better than something else or the current situation, but still not perfect."
The adjective マシ was derived from 増す(ます、verb "increase").
もし、>>410さんが日本人で、日本語のマシを英訳するために
適当な英語を探しているなら、might be better のように、
推測の意味を持つ助動詞を good, well, better などと一緒に
使うといいかも知れません。