uneven (
http://definr.com/uneven)
adj 1: not even or uniform as e.g. in shape or texture; "an uneven
color"; "uneven ground"; "uneven margins"; "wood with
an uneven grain" [ant:
even]
2: (of a contest or contestants) not fairly matched as
opponents; "vaudeville...waged an uneven battle against
the church" [syn:
mismatched]
3: inconsistent in quality [syn:
spotty]