Top Definition
When you ask for a Guinness at the pub and the bartender serves it after she dips her nipple in it.
I asked traci for an Irish dip and she obliged with a smile and a foamy nipple.
by CrAzEeBiTcH September 21, 2016

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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 March 19, 2006

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