Definition of "Snag" :

noun: an unforeseen obstacle

noun: an opening made forcibly as by pulling apart

"She had snags in her stockings."

noun: a dead tree that is still standing, usually in an undisturbed forest

"A snag can provide food and a habitat for insects and birds."

noun: a sharp protuberance

verb: hew jaggedly

verb: catch on a snag

"I snagged my stocking."

verb: get by acting quickly and smartly

"Snag a bargain."