If you're planning a trip to Ireland, or just a jaunt to an Irish enclave in your city, knowing some Irish words and phrases can do a lot to increase your popularity (or give you a head's up on what the Irish natives are saying!)
Just keep your cool and bide your time. You don't want to be deemed "thick as a plank" or "not the full shilling" (as in stupid), or called a "glunterpeck" (Irish slang for an idiot.)
In fact, if you jump in too fast without knowing how it's done, the locals might just "slag" you. No, they won't be throwing gravel at you. Slagging is a form of light mockery. They'd just be making fun of you, but don't take it to heart. They mean well. They're merely messing with your head.
The Irish are known for their sense of humor, and if you spend much time around them, you'll discover it for yourself. Just sit back and enjoy the "craic" (fun, good times).
If an Irishman agrees with your opinions or actions, he'll wish "fair play to you." If all is going very well, you will be "suckin diesel."
These are just some of the fun Irish words and phrases you can pick up if you keep your ear to the ground.