Irish (n.): to be Irish is to be able chug any filthy alcohol no matter what.

Beer, esp. a light variety (e.g. ale, lager, etc.)

A girl who likes beer; all kinds of beer. She knows what she wants, like an amber ale or stout, not just crappy lite beer. This is a girl who will order herself a beer in a bar, she doesn't want a pussy Cosmo or screwdriver.

This is the beer that is most identified with any particular micro, craft or regional brewer. Usually it is the first beer, or one of the first beers the brewery made when they began their business. Although a flagship beer can be any style of beer, it is often one popular with a majority of beer drinkers. Occasionally, a brewery will have more than one flagship beer. Deschutes Brewery in Bend, Oregon, has two: Mirror Pond Pale Ale and Black Butte Porter. Other examples of a flagship beer include Sierra Nevada's Pale Ale, New Belgium's Fat Tire Amber Ale and Dogfish Head's 60 Minute IPA. According to the Brewers Association any flagship beer must be an all malt beer.

An amber ale brewed by New Belgium Brewing Company of Fort Collins, Colorado.

Beer Induced Leg Failure. A condition where by the sufferer falls over and hurts themselves or looks stupid. Condition is caused by endulging too much in the glorious amber ale we know as beer. Symptoms which indicate a case of BILF is iminent include swaying and stumbling.

To hit the bottle with a brown felt tip or hitting the bottle with a brown felt tip is a form of traditional glass beer bottle tapping common in the Seaside Town of Bridlington, East Yorkshire in England UK.
Amber or brown glass beer bottle tapping is locally known as tapping the glass or hitting the bottle with a brown felt tip and implies quite simply that one, when ones' glass (or bottle) is empty quickly taps the side of the glass or bottle (with a brown felt tip pen) to give notice audibly to anyone in range that another beverage is required by the tapper.
Landlords in Public Houses in Bridlington now insist that only brown felt tip pens are used for bottle hitting. The reason for this is that if the ink end of the felt tip were to touch the label (or glass) then only a brown mark would be left which may (or may not) blend in with the brown glass or commonly used cream/brown labels.
Vulgar colours such as Purple, Pink and Yellow are frowned upon and usually a tappee (one who taps) would either be ignored or escorted from the premises for failing to adhere to the appropriate colour code.
Quite often one may see the sign "Tap Room" as one enters (or leaves) a Public House in Bridlington. Tap Room is (of course) a simplified version of "Tapping Room", easier to read when driving by in a hurry or when not quite sober and visually wonky.