Is this healthy

I’m 22M and I drink 2-4 times a month. But what I do I get a glass and pour 10-15 drinks I then drink all this in under 2 hours. I then slam water until I sober up abit and sleep. I don’t drink to often but when I do I go ham is this horrible for my health? I work and go to school and go to the gym 3 times a week. But recently people look at me funny when I drink a full glass of vodka