In school a slash and dash is when you go to class, sign in, and then leave. Only once have I ever done it, my second year of college. It was spring, the weather was amazing and my friend (Kip) and I went to class. We fully intended to stay. There were no plans to dash. We signed in, found our seats (by the open window) and sat for a couple minutes. I looked at Kip and said “Do you really want to be here?” He said “Nope”.
“Wanna get out of here?” I asked.
“Yep” he said. We were deep conversationalists. So we split.
We got about 40 feet down the hall and Kip looked at me and said “Dude. We just slashed and dashed ethics class.”
“Wow” I said. “Do you want to go back?”
“Nope” he said. So we went and played golf on my other roommate’s Apple II.