The phrase "stiff neck" refers to a condition where the muscles in your neck feel tight, causing limited movement and discomfort when trying to turn your head. Full definition
No more stiff neck when you wake up and it's your turn to drive. (twiniversity.com)
No more stiff neck, no more back pain. (nayoya.com)
All of this just adds to a litany of office - related ills we are already familiar with through academic and anecdotal evidence, from stiff necks to carpal tunnel syndrome to eye strain. (canadianbusiness.com)