What is Grab-assing?
1.
Bullshitting; making small talk
"You guys need to cut out the grab-assing and get to work."
See
2.
an expression used to refer to the horseplay being committed by others that has become annoying; also refers to horseplay, that by some aspect would likely be annoying and/or offensive to others.
e.g. "Hey! Knock off the grab-ass!" or "Hey! Knock off the grab-assing!"
See