heavy-handed
mod. tactless; forceful; unfair.Paul is a little heavy-handed at times, but mostly he's reasonable.That was a pretty heavy-handed thing to do.
hit (someone) below the belt
tr. to deal with someone unfairly.Don't hit below the belt!You were hitting Tom below the belt when you said that.
low-blow
n. an unfair blow.No fair! That was a low-blow.Coming in like that unannounced was a pretty low-blow.
No fair!
exclam. “That's not fair!”No fair! I saw it first!That's no fair! We paid full price to see this movie.
not cricket
mod. unfair; illegitimate; unorthodox.You can't do that! It's not cricket!What do you mean it's not cricket? You do it.
raw deal
n. an unfair deal; unfair treatment. (Always with a.)You really got a raw deal.My last job was a raw deal. I hope this is better.
shaft
n. a bad deal; unfair treatment.He really gave me the shaft.It's the shaft whenever you go into that place.