Punchy

adjective

1. Having a punch; effective; forceful; spirited; vigorous.
2. Behaving or appearing punch drunk.
3. (of a person) Being over-reactive to routine events.

   "I was so sleep deprived I was starting to get punchy."

4. A term used by Nordic skiers (especially skate skiers) to describe groomed snow that does not support the weight of a skier, especially when the skier’s weight is all on one ski, resulting in a ski punching through the surface of the snow.
5. Short and thick; fat; paunchy