Be pushing (an age) informal
Used to say that someone is going to attain a particular age
I couldn't do the heavy lifting when I was pushing 60.
Though he is pushing 30, he has not gotten a job.
Next Friday is her birthday. She is pushing 20.
My mom is pushing 50, but she looks very young.
Used to indicate that the age at which a person's consent to sexual relations is legitimate.
Another individual is far older than the individual in question
Said when a person is in a romantic or sexual relationship with another younger person
Look older than a certain age
An age that ends in a zero, especially as marked by a landmark birthday
The verb "push" should be conjugated according to its tense.
John is going to get married when he is pushing 30.
The origin of this expression is not clear.