Having or showing a bad temper
He'd been in a grumpy mood since he got up.
She headed for the door, tossing a grumpy reply over her shoulder.
Dean simply shook his head, committed to being grumpy for the entire day.
A grumpy meow drew her gaze to Xander's cat, who rubbed its face against her leg.
Fred O'Conner, dressed for the slopes, gave a grumpy wave.