"push the plunger" is correct and can be used in written English.
You can use it when describing an action involving a plunger, as part of a sentence. For example: "Tom pushed the plunger to dislodge the clog from the sink."
The technique was to push the plunger in slow but large.
George would surely push the plunger, and when the dust cleared, only one player would be sure of remaining standing.
We can all guess what the Boss would do -- push the plunger, implode this team like a project that had outlived its usefulness.
I'd draw my food and water into it, direct the spout between my teeth and cheeks and push the plunger down.
It was a thrill akin to watching Wile E. Coyote push the plunger on a load of Acme dynamite to hear Mr. McCain tag Pat Robertson, Jerry Falwell, Louis Farrakhan and Al Sharpton, all in the same breath, as "agents of intolerance".
To give herself an effective hit, the drug user must apply a tourniquet, raise a vein, probe with the needle, neatly pierce the epidermis and the wall of the vein, watch for the smoky plume of blood to rise up through the needle and into the barrel of the syringe, release the tourniquet then push the plunger home.
Officer Peters leans forward and carefully inserts the needle into her lieutenant's belly and pushes the plunger.
This field house makes a New Yorker want to rush home and do the Fountainhead thing by pushing the plunger on that claustrophobic den called Madison Square Garden.
This certainly is not the case in the dreadfully conceived Arthur Ashe Stadium, where nobody has yet performed the Fountainhead thing and pushed the plunger, so they could start all over.
When the airplane was about to cross over the United States border, they say, he went to the restroom, washed his face, brushed his teeth, put on cologne, returned to his seat, said prayers, and then pushed the plunger on the device — but it failed to detonate.
Once the phase separation occurred, the upper layer could be narrowed into the capillary tube by pushing the plunger; thus, the collection of the upper layer solvent was simple and convenient.
