We should use "unsportsmanlike" outside of formal competitions, to describe things that shouldn't be outright illegal, but are definitely not in the spirit of what we're trying to accomplish here.
Cheating on your spouse? Unsportsmanlike.
Taking advantage of people's generosity? Unsportsmanlike.
Murder? Very unsportsmanlike.
#being a dickhead online
#bloody bad form old chap
"Bad form" is also a good phrase
More good options:
"Unbecoming"
"You forget yourself"
Giving them a thumb down 👎











