Teetotaler (noun)

A person who abstains completely from the consumption of alcohol.

Origin:

Derived from the phrase "tee total" which means "total abstinence from alcohol".

Examples:

1. He"s a teetotaler, he doesn"t drink alcohol at all.
2. I"m a teetotaler, I don"t drink alcohol.
3. The party was attended by teetotalers, no one was drinking.
4. My sister is a teetotaler, she stopped drinking 2 years ago.
5. I decided to be a teetotaler for a month, it was hard but I felt better.