More specifically, the irish exit refers to the departure from any event without telling any friends, associates or acquaintances that one is leaving. It is almost always the result of being very inebriated/intoxicated.
Man 1. Hey man, where'd you go last night? You just disappeared, did you take a girl home or something?
Man 2. Nah, I got drunk and pulled an irish exit. Uh... happy birthday by the way.
The crumpled, unorganized, rat's nest looking wad of cash usually consisting of ones and fives (though tens and twenties can sometimes, though rarely, be seen) found in the pockets of someone who went out drinking (heavily) after an ill-advised decision to pull out a few twenties from the bank/ATM. The barwad, when uncrumpled and counted, is typically found to be considerably less than the amount withdrawn. Most often found on patrons of cash-only bars.
1. I had a terrible day today. I was so incredibly hungover, puked three times after I woke up, and then when I tried to grab some food, my barwad from last night could barely pay for my breakfast burrito.