A phrase used when someone wants to make something seem less offensive. Most of the time it just makes them sound like an asshole.
Person 1: "no offence" but you are fat and lazy...
Person 2: yeah well "No offense" but, this is why your mom doesn't love you...
a phrase used to imply you are about to offend someone
"No offence but your dress looks shit."
A high degree of verbal violation
What you said is a platinum offence.
As opposed "Offensive" which is the correct spelling, often spelled wrong by the same people who 'a' as "uh".
It's offencive to me that someone fucks up the spelling of "Offensive". It's not 'offencive'.