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
Bart	[ba:t]
Dalal	-	Arabic
Sybil	['sibil]
Latasha	lə-TASH-ə	African American
Constantina	-	Late Roman
ŞEbnem	-	Turkish