To press something against (to press and attach); to push against and hold in place.
ポスターを壁に押し付けて貼った。
I pressed the poster against the wall to stick it up.
泥で汚れた手を服に押し付けないでください。
Please don't press your muddy hands against your clothes.
窓ガラスに顔を押し付けて外を見ていた子どもたちがいた。
There were children pressing their faces against the window to look outside.
To foist or impose (a task, responsibility, opinion, etc.) on someone; to force one's will onto others.
上司が残業を部下に押し付けた。
The boss forced the overtime work onto his subordinates.
自分の考えを他人に押し付けるのはよくない。
It's not good to impose your opinions on others.
親の期待を子どもに押し付けてはいけない。
You shouldn't force your expectations onto your children.