Definition of pished:
(v) :
To try to attract birds by making a sibilant noise (e.g. "psshh").
(n) :
A sibilant noise (e.g. "psshh") made by birders and ornithologists to attract small birds.
(n) :
Synonym of pish posh (“nonsense, poppycock”).
(v) :
To express contempt.
(adj) :
(vulgar, colloquial, chiefly Scotland) Of poor quality; very bad.