'Be-Re-Oud' (Rhymes with Period)
The male version of a period that occurs after said male has drunk too much the night before.
Often combined with a hangover the Beer'eriod is the sudden (and often explosive) distribution of faeces that is consistent with diarrhoea.
After this brief episode the male feels considerably better and can continue with his daily routine of tasks.
Male1: I feel terrible after last night, think I need to go to the toilet..
Male2: After you have a Beer'eriod you will feel so much better.