Noun
toilet humour (uncountable) (British spelling)
(euphemistic) Scatological or vulgar language intended to be amusing.
From the stage I've seen people of all ages absolutely roaring at really good toilet humour. Ade Edmondson
There is a lot of rubbish written about toilet humour - people saying it is childish and pretending it is beneath them - but there is no doubting the effectiveness of a really good willy gag. Ade Edmondson