A snail goes into a bar and the barman tells him there’s a strict policy about not having snails in the bar and so kicks him out. A year later the same snail re-enters the bar and asks the barman “What did you do that for?”
Snail = a small creature (like a slug) with a round shell on its back. Snails are known for being very slow.
Policy = rules, a plan of action or ideals of a business or political party
Strict = unbending or uncompromising, demanding that rules be obeyed
To kick (somebody) out = to send someone away, to expel.
Why is it funny?
The snail took so long to return back into the bar and ask why it was kicked out.
Have you ever been kicked out of a bar?