be gagging for something
be gagging for (something)
To have a strong desire for something, especially a beverage of some kind. Primarily heard in UK, Ireland. Good lord, I am gagging for a cup of tea.
See also: gag
be gagging for somethingBRITISH, INFORMAL
COMMON If someone is gagging for something, they want it very much. I arrived there late, hungry and gagging for a drink.