What does it mean to get drunk? what happens to your body?

It is complicated: Alcohol is a central nervous system depressant. As the alcohol enters your blood stream, the part of your brain that controls social interactions is suppressed and you may feel giddy and more talkative. As the process continues with further drinking, other more critical brain functions become supressed which eventually can lead to unconsciousness and suspension of respirations and death.

Increasing sedation: Alcohol is a sedative, and the more we take in, the more sedated we get. Individuals vary in their tolerance based on their prior use of alcohol and their own biology, but at some point (usually at levels > 100 mg%) it effects our balance, coordination, speech and judgement, and ultimately will cause sleep. If we drink beyond that, stupor, coma and death can occur. Legally, over 80mg% is drunk.