(as) plain as a pikestaff
US /əz pleɪn əz ə ˈpaɪk.stæf/
UK /əz pleɪn əz ə ˈpaɪk.stæf/

1.
gün gibi ortada, apaçık
very obvious and easy to understand
:
•
His guilt was as plain as a pikestaff.
Suçu gün gibi ortadaydı.
•
The instructions were as plain as a pikestaff, so I don't know why he made a mistake.
Talimatlar gün gibi ortadaydı, bu yüzden neden hata yaptığını bilmiyorum.