To loosen, unfasten, or free by or as if by undoing snaps. (verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "unsnap" in a sentence
"I carry a poncho that you can unsnap the sides and it turns into a tarp that is big enough to make a shelter out of, it also has gromets in the coners and in the middle of the edges."
"I stiffened as I felt him unsnap my bra, one handed."
"Maria saw the coach unsnap his phone from his hip holster."