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.

• go ahead with
• go ahead with something
• go all out
• go all round the houses
• go all the way
• go along
• go along for the ride
• go a long way
• go a long way toward
• go a long way toward something
• go along with
• go along with someone
• go along with something
• go amiss
• go ape
• go around
• go around and around
• go around in circles
• go astray
• go at it hammer and tongs
• go back a long way
• go back to the drawing board
• go ballistic
• go bananas
• go beet red