The act of looking through someone's Instagramaccount, going past 30 weeks and not liking a single post.
Guy 1; Bro I was looking through this one girls account for 2 hours.
Guy 2; Dude that's intense. Did you like any of her pics?
Guy 1; no way man I was 56 weeks into that shit.
parental shoulder lurking is when a parent or guardian reads your IMs, facebook, or any other computerized messaging system. they would 'lurk' over your shoulder and read your personal messages that you have with friends or other people.
me: mom! would you quit your parental shoulder lurking! i'm not doing anything bad!