To commit to attending an event 100% and then not showing up. Especially if someone questions whether or not you will actually show up and you make a point of confirming you absolutely will attend.
"Hey wasn't Ben coming to the party tonight, I saw he RSVP'd and he told me he was coming?"
"Yeah, he said he was coming, but apparently he decided he was pulling a Shannyn instead"
"Yeah, he said he was coming, but apparently he decided he was pulling a Shannyn instead"
by QUTRunningtruths February 27, 2017
Get the pulling a shannynmug.