Someone who constantly watches their phone, waiting for a text or social media update to pop up in which they'll like and/or comment within seconds. The only time a Phone Sniper doesn't text back immediately is when he/she doesn't want to.
Dude: Hey

(Seconds later)

Phone Sniper: Hey

Dude: That was fast, you phone sniping me?
by Alex Halstead March 19, 2017
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