under the matress - meaning and definition. What is under the matress
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What (who) is under the matress - definition

MEDICAL DEVICE USED FOR THE IMMOBILISATION OF PATIENTS
Vacuum matress
  • moulding of the vacuum mattress
  • preparation of the vacuum mattress

under the matress      
Guilty pleasure, clandestine passion.
Kraft Mac n' Cheese is my under the matress food o' choice.
Under the Hood Café         
  • Photo from grand opening of Under the Hood Cafe
Under the Hood Cafe; Under the hood
Under the Hood Café was a coffee house located at 17 South College Street in Killeen, Texas. It provided services for soldiers located at Fort Hood, one of the largest American military installation in the world.
down under         
COLLOQUIALISM TO REFER TO AUSTRALIA AND NEW ZEALAND
Down under; Downunder; Down-under; Down-Under
informal
¦ adverb in or to Australia or New Zealand.
¦ noun Australia and New Zealand.

Wikipedia

Vacuum mattress

A vacuum mattress, or vacmat, is a medical device used for the immobilisation of patients, especially in case of a vertebra, pelvis or limb trauma (especially for femur trauma). It is also used for manual transportation of patients for short distances (it replaces the stretcher). It was invented by Loed and Haederlé, who called it "shell" mattress (matelas coquille in French).