n., v.

When one sends a Snapchat photo to someone that they have recently contacted through text, Facebook message, twitter DM, etc. but not received a reply, with the intention of seeing if the receiver is in fact, ignoring or avoiding them as any snaps sent have a status indicator of whether the person has received or opened the aforementioned snap. If the snap was opened, the sender knows s/he is on his phone, fully capable of replying.

This can also be done to see if the person is actively on their phone BEFORE contacting them through text, Facebook etc.

This simple tactic is usually used by smart(crazy) girlfriends who are concerned about their boyfriends whereabouts or what he is doing and want to trap him with a snapchat, invalidating any excuse such as "my phone died, my phone was off, I wasn't using my phone" etc.
I told my girlfriend I was busy and couldn't use my phone but i really was at home with the side bitch. She texted me 3 times anyway to which i didn't reply then she sent me a Snaptrap. I opened it by accident and she immediately called me and asked what I was really doing.
by JGreen150 October 2, 2014
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when they won't text back but they opened that last snapchat
I know she saw my message, she fell for my snaptrap.
by failsafe June 1, 2015
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(noun): When a woman intentionally leaves a sexy/provocative photo as the last snap in her story, knowing full well it'll be visible from the main feed. This then encourages males to want to see said photo, however, the female has cleverly placed it after some absurd number of non-revealing and, honestly, quit boring photos. The woman is then easily able to see which males put in the work to get to said photo and thereby allowing her to calculate which males fancy her. SnapTrapping usually has the effect of feeding a woman's ego.
guy1: Bro, did you see Ashley's snap last night? Them titties was poppin!
guy2: Na bro, I ain't about to get suckered into that snaptrap by tig ol' bitty Ashley!
by zerO_One June 10, 2018
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When you seem to hit it off with a girl then kinda lose each other once you add her on snap. This can also be when you give a girl your snap instead of your real number because you're uncertain and it's way easier to ghost her there.
"I heard you were talking to Ashley!?"

"Not really, we fell victim to the snaptrap."
by darkwhitein1955 January 11, 2018
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When someone snapchats you without you knowing and without permission.
Marcea always asks me to repeat the funny things I say so she can snaptrap me.
by Aunt Jenny April 19, 2016
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