in other words; what I (you, etc.) mean is

to startle; to surprise; to astonish

being apt to make a show of one's faults; penchant for boasting of one's faults; pretending to be worse than one really is

bad taste

interest in Communism / Communist topics as a casual hobby

everything

(colloquial) current boyfriend

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all

having a comeback or excuse for everything one is told, being smart in the sense of having a smart mouth