1. a shot taken at an easy or casual target (as by a pothunter);
2. criticism aimed at an easy target and made without careful consideration; - Example: "reporters took potshots at the mayor"
WordNet (r) 3.0 (2006):
potshot
n 1: a shot taken at an easy or casual target (as by a
pothunter)
2: criticism aimed at an easy target and made without careful
consideration; "reporters took potshots at the mayor"