You were his son/daughter. He has always been addicted to alcohol and you were used to it! Your mom has left you because she couldn’t stop the addiction. She left you and your dad, so you were stuck with your dad which wasn’t always a fun experience…

Oi! gimme vodka!! YOU ARE BLOCKING THE TV IDIOT! Goddammit!

He said being drunk and all woozy of the alcohol, looks like he was drinking and it was unpredictable what he could do..