To ruin ones compliment that a third party has given them.
Judy: Steve you're so nice
Tim: No hes not
Steve:Dude quit compliblocking
Bob: Jenna's so sweet
Becky: yeah, a sweet bitch
When someone you know blocks you. Not because you did anything wrong, but because they can't resist you otherwise.
Karen: I removed your number from my phone several days ago. I then blocked your number. This was not because I hate you, but rather I seem to have a difficulty time setting and upholding boundaries with you.
Matt: I've never been blocked before. This reads as a compliment. Thanks for the compliblock.