The well is the shelf under the bar where they keep liquor at hand for mixing drinks. So, a well brand or house brand is the brand of liquor served when a customer requests a drink by its generic name (e.g. gin and tonic, scotch and soda). It's usually the least expensive brand served, as opposed to more expensive call brands.
Order me a Jack and Coke. Their well brand tastes like bathtup gin.
In many towns in Ireland, 'well' is a salutation or greeting. Having used the expression all my life, I've never been able to figure out whether it's a kindly-meant enquiry as to whether or not all is well with the person so addressed, or simply an expectant demand for news updates - in my hometown, it always felt like the beginning of an interrogation!
1. <interjection> An expression of surprise or disbelief
2. <adverb> Skilful/skilfully
3. <adverb> Intimately
4. <adverb> informal; extremely
5. <noun> A bored hole into the ground to tap a supply of water, gas or oil
6. <noun> slang; The toilet
1. Well! I never expected John to be THAT good in bed!
2. Well done, Pete
3. I know your mother VERY well...
4. OMG Dat's well good dat! OMGOMG1
5. James, go and fetch a pail of water from the well, there's a good boy.
6. Hold on a second I've gotta use the well...