Everyone experiences the occasional sleepless night and is grumpy the next day, but any parent can tell you that when kids miss their naps and aren't getting enough sleep, they're a real bear to deal with.
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.