Wordnet 3.0
ADJECTIVE (2)
1. 
 (birds or insects) characterized by or tending to chirp; 
2. 
 characterized by liveliness and lightheartedness; 
- Example: "buoyant spirits"- Example: "his quick wit and chirpy humor"- Example: "looking bright and well and chirpy"- Example: "a perky little widow in her 70s"[syn: buoyant, chirpy, perky]
WordNet (r) 3.0 (2006):
chirpy
    adj 1: (birds or insects) characterized by or tending to chirp
    2: characterized by liveliness and lightheartedness; "buoyant
       spirits"; "his quick wit and chirpy humor"; "looking bright
       and well and chirpy"; "a perky little widow in her 70s" [syn:
       buoyant, chirpy, perky]