ちょっと一杯[chottoippai] let's have a quick drink
ばつ一[batsuichi] being once divorced
一向[hitaburu] nothing but
サラダ一皿[saradahitosara] plate of salad

安全第一[anzendaiichi] safety first
一か八か[ichikabachika] sink or swim
一っ走り[hitoppashiri] spin (as in 'take a car for a spin')
一つ一つ[hitotsuhitotsu] one-by-one

双眸[soubou] pair of eyes
眸子[boushi] eye
一眸[ichibou] one sweep (of the eye)

明眸[meibou] bright or beautiful eyes
黒い眸[kuroihitomi] (beautiful) dark eyes
明眸皓歯[meiboukoushi] starry eyes and beautiful white teeth (said of beautiful women)