A heavy drinking session.
- ‘the square is used mainly for late-night grog-ons’
- ‘The party-goers despise those who take grog-ons seriously.’
- ‘We're all going up to the hills for a grog-on tomorrow.’
- ‘Authorities take a dim view of grog-ons.’
- ‘The staffers attend grog-ons on Wednesday nights.’
- ‘He had to put the others to the test: an invitation to a grog-on.’