- plain as a pikestaff
- *plain as day & *plain as a pikestaff1. Cliché very plain and simple. (*Also: as \plain as a pikestaff.) •
Although his face was as plain as day, his smile made him look interesting and friendly.
•Fred: I have a suspicion that Marcia is upset with me. Alan: A suspicion? Come on, Fred, that's been plain as a pikestaff for quite some time!
2. and *plain as the nose on one's face Cliché clear and understandable. (*Also: as \plain as a pikestaff.) •The lecture was as plain as day. No one had to ask questions.
•Jane: I don't understand why Professor Potter has been so friendly this week. Alan: It's plain as the nose on your face. He wants to be nominated for Professor of the Year.
Dictionary of American idioms. 2013.