bull's eye (
http://definr.com/bull's eye)
n 1: in target shooting: a score made by hitting the center of
the target; "in repeated sets of five shots his numbers
of bull's-eyes varied"
2: the center of a target [syn:
bull]
3: something that exactly succeeds in achieving its goal; "the
new advertising campaign was a bell ringer"; "scored a
bull's eye"; "hit the mark" [syn:
bell ringer,
mark]