pin beneath

pin (someone or something) beneath (someone or something)

To restrain or immobilize someone or something beneath someone or something else. Often used in passive constructions. The earthquake pinned me beneath a fallen beam. He was pinned beneath the giant wrestler. I pinned the trap beneath a hefty boulder to keep it from being blown away.
See also: beneath, pin
Farlex Dictionary of Idioms.

pin someone or something beneath (someone, something or an animal)

to trap someone or something beneath someone, an animal, or something. The mine cave-in pinned four miners beneath a beam. I held the alligator's mouth closed and pinned it beneath me.
See also: beneath, pin
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • pin (someone or something) beneath (someone or something)
  • push (someone or something) under (something)
  • lay (something) under (someone or something)
  • lay under
  • contempt
  • fall beneath
  • fall beneath (something)
  • come under
  • come under (someone or something)
  • beneath (someone or something)
References in periodicals archive
The actual trigger is surrounded by a blade pivoting on a pin beneath the chassis, a unique design guaranteeing a smooth, effortless trigger pull with a rapid reset.
A .22 IN 9MM CLOTHING TAURUS: TX22
The pin beneath those two pins is a roll pin that also retains the magazine tube.
Henry .22 repeating rifle