Answer: A British idiom, expression; I encountered it often in Yorkshire. "I could murder a beer right now." Means the speaker really desires a beer, would love to have one. "I could murder a cup of tea right now." etc.
Answer: No, you wont vomit bile. But if you have an obstructed gall bladder which stores your bile then you will vomit bile.You know the problem which is dangerous for alcoholics is liver cirrhosis and hepatic encephalopathy. Because ammonia will get into the brain.
Answer: You should not combine Excedrin (whether Excedrin Extra Strength. Excedrin Migraine, Excedrin Menstrual, or Excedrin Back & Body) and meloxicam. Excedrin contains acetaminophen (Tylenol), aspirin (a non-steroidal-anti-inflammatory), and caffeine.
Meloxicam (Mobic) is also a non-steroidal-anti-inflammatory.
Unless your doctor tells you she is comfortable with you taking both medications, you should avoid combining these medications. Taking too many NSAIDs can cause issues with bleeding such as causing stomach ulcers.