a termed used in Ireland and the UK, generally regarding drinking. It means to keep it going, don't stop. can be used for other things than just drink, but generally its said then.

The phenomenon of having to come out as bisexual to the same person/people repeatedly because they assumed or hoped that your sexuality was a "phase." Refers less to the holiday and more to the 1993 Bill Murray comedy film in which the main character experiences the same day over and over.

Keeping it real, Grinding it out, Making sure that the fire will not go out, accelerating at speeds up to and over 100 mph.

As others have said, used when drinking and when driving cars fast, but heavily used by motorcyclists (due to Northern Ireland having a massive motorbike culture in the 70's 80's and 90's). Keep 'er rubber side down, Keep 'er between the hedges and Keep 'er on the pipe are all other terms that spawned from Keep 'er lit in that community.