push down
1. To shove, thrust, or press someone or something forcibly downward. A noun or pronoun can be used between "push" and "down." His older brother kept pushing him down so he couldn't reach the toy on the shelf. I keep pushing down the lid, but it won't stay shut.
2. To shove, thrust, or press someone or something forcibly down and into something. A noun or pronoun is used between "push" and "down." I pushed the bag of money down the drain pipe so the police wouldn't find it. Investigators believe someone pushed the poor woman down the well.
push someone or something down
to force someone or something downward. Every time he tried to get up, the other boys pushed him down again. I pushed down the button and the machine began to operate.