To make a hasty exit, dip out, from a social gathering without announcement or saying goodbye to anyone.  Especially relevant when alcohol is involved.
We assume Molly gave us the irish dip when we turned around to ask her a question after drinking a pitcher of beer and she was nowhere to be seen.
by Danny O'Toole April 4, 2006
 Get the irish dipmug.
Get the irish dipmug. by CrAzEeBiTcH September 21, 2016
 Get the Irish Dipmug.
Get the Irish Dipmug. by 1916dog November 1, 2021
 Get the irish dipmug.
Get the irish dipmug.