be the wrong side of 30 etc

be (on) the wrong side of 30/40 etc.

to be older than 30, 40 etc. I don't know his exact age but I should say he's the wrong side of fifty.

Name	Pronounced	Usage
Rowell	['rauəl]
Valter	-	Portuguese, Italian, Swedish, Norwegian, Danish, Slovene, Croatian, Estonian
Gyeong	gyung	Korean
'Ari'el	-	Biblical Hebrew
Celandine	SEL-ən-deen	English (Rare)
Metrophanes	-	Ancient Greek