everything

(colloquial) current boyfriend

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

everyone, one and all

air gun

(colloquial) unable to pick up on social cues or the situation; lacking social awareness or situational awareness

compressed air

to sense or guess the mood or atmosphere of one's surroundings; to read the room

(mechanics) aerodynamics

(exercise) wall squat / A group activity where a ring of people attempt to maintain the position of "sitting" on the lap of the person behind them.