To get overly sensitive and deflated when someone busts your balls or points out your BS. Usually followed by staring at the ground, kicking rocks and mumbling under your breath.
Guy #1-"Yeah, Dave was trying to front on what he was "gonna do" to his bike, then I pointed out he hasn't even touched his truck yet."
Guy #2-"What happened then?"
Guy #1-"He got all spencitive and walked away mumbling something about me being a dick"