push the envelope
To go beyond established limits; to pioneer.
They pushed the envelope on pricing derivatives.
verb
To apply a force to (an object) such that it moves away from the person or thing applying the force.
In his anger he pushed me against the wall and threatened me.
You need to push quite hard to get this door open.
To continually attempt to persuade (a person) into a particular course of action.
We are pushed for an answer.
December 22, 1711, letter to The Spectator Ambition […] pushes the soul to such actions as are apt to procure honour and reputation to the actor.
To press or urge forward; to drive.
to push an objection too far; to push one's luck
to push his fortune
To continually promote (a point of view, a product for sale, etc.).
Stop pushing the issue — I'm not interested.
They're pushing that perfume again.
To continually exert oneself in order to achieve a goal.
Don't think that if you keep pushing harder and harder, it will make you succeed faster or earn more.
noun
A short, directed application of force; an act of pushing.
Give the door a hard push if it sticks.
An act of tensing the muscles of the abdomen in order to expel its contents.
One more push and the baby will be out.
A great effort (to do something).
Some details got lost in the push to get the project done.
Let's give one last push on our advertising campaign.
An attempt to persuade someone into a particular course of action.
A force that impels or pressures one to act.
I guess it's just the special curse of working under deadline's push
noun
A pustule; a pimple.
a Push rise upon his Nose