A guy goes into a bar with a giraffe.

He calls the barman over and orders a
pint of lager for himself and one for the giraffe.

They both 'neck' their
pints (i.e. down the drinks in one gulp) and the guy orders another.

This
goes on for 3-4 hours, when eventually, the giraffe keels over onto the
floor.

The guy turns to walk out the door, and the barman calls after him:
'Hey, you can't leave that lyin' there!'

The guy replies, 'That's not a
lion - it's a giraffe'.