Doing date activities with a friend of the opposite sex to avoid actually having to date someone.
To the unaware third party observer the pair looks like they are together.
Similar to "friendzone" but more positive because neither party wants a romantic or sexual relationship.
"I heard you and Jane went to a nice dinner and a concert together, are you two dating?"
"No, she is just a cool girl to hangout with so we are just nondating"