Synonyms:
- Not to be approached lightly
- Growling at anything that moves
- Making his feelings known without subtlety
- Taking it out on the immediate vicinity
- Several degrees below friendly
- Not in the market for pleasantries
- Radiating strong leave-me-alone energy
- Best encountered from a safe distance
- Operating at minimum charm
- Deeply unimpressed with everything
- Giving off powerful do-not-disturb signals
- Communicating primarily in grunts