a sip
Examples
Did you ever taste beer''I had a sip of it once,' said the small servant. 'Here's a state of things' cried Mr Swiveller . . . . 'She never tasted it - it can't be tasted in a sip'
I haven't had a sip of alcohol since 1986.
If both John McCain and Obama were given a sip of truth serum, both would admit they made serious mistakes in choosing running mates in 2008.
A sip of wine, a cigarette, And then it's time to go. I tidied up the kitchenette; I tuned the old banjo. I'm wanted at the traffic-jam. They're saving me a seat.
Very intense first summer out, to be 18 years old and never having gone on a date, never having smoked a cigarette, never had a drink, even a sip of beer, never kissed a girl, all of those things. It made for a fairly intense first year out.
A sip at a time empties the cask.