By craic-ing his knuckles.
Envelope
An elk It has the E, the L, and the K. Would like to hear some more if you guys have any.
Whiskey sour
The designated driver.
2: Not much, Brian. I had a pint yesterday. 1: Oh! Really I thought you were only 15 2: I am! 1: So what was it Guiness 2: No, it was water.