Verb
To loose the buckles of; to unfasten; as, to unbuckle a shoe.
Source: Webster's dictionaryI honestly don't even know how I got into acting. It happened so quickly because my mom and sister used to do commercials, and apparently when I was little I would unbuckle myself from the stroller and crash their auditions. Bailee Madison
Unbuckle your seat belt Source: Internet
One time he managed to unbuckle his car seat belt and was then strangling his mother, to her great shock. Source: Internet
Not knowing the danger, Harry tries to unbuckle the Doctor's harness. Source: Internet
Thleen sat down on a fence to unbuckle all her extensions and mask, stripping down to shorts and a maillot. Source: Internet