An example of a sarky person is someone who says they like someone but make unkind comments about the person.
Origin of sarkyfrom sarc(astic) + -y
adjectivesar·ki·er, sar·ki·est Chiefly British Slang
Origin of sarkyShortening and alteration of sarcastic
(comparative sarkier, superlative sarkiest)
- (UK, informal) sarcastic
From sarcastic +"Ž -y.