1. 
[syn: barbed, biting, nipping, pungent, mordacious]
2.  biting or given to biting; 
- Example: "they deliberately gave me a skittish and mordacious mount"
The Collaborative International Dictionary of English v.0.48:
Mordacious \Mor*da"cious\, a. [L. mordax, -acis, fr. mordere,
   morsum, to bite. See Morsel.]
   Biting; given to biting; hence, figuratively, sarcastic;
   severe; scathing. -- Mor*da"cious*ly, adv.
   [1913 Webster]
WordNet (r) 3.0 (2006):
mordacious
    adj 1: capable of wounding; "a barbed compliment"; "a biting
           aphorism"; "pungent satire" [syn: barbed, biting,
           nipping, pungent, mordacious]
    2: biting or given to biting; "they deliberately gave me a
       skittish and mordacious mount"