Toilet humour

Public reference to bodily functions such as urination and defecation arouses intense anxiety in many people. For this reason, there is a whole sub-genre of humour, toilet humour based around excretion. This genre is particularly popular with children.

Much of the lyrical content of avant garde rock musician Frank Zappa's songs revolved around toilet humour, eg, "Watch out where the huskies go, and don't you eat that yellow snow" (from the album Apostrophe)

Toilet humour also refers to jokes around modesty, such as if one is seen naked or in his/her undergarments. It can also refer to jokes revolving around the incontinence of infants and young children.

Many forms of toilet humour involve euphemisms for excretion, such as the following:

Urination

A French whistle
Breaking the seal
Change water on the goldfish
Draining the dragon
Draining the main vein
Draining the radiator
Draining the one-eyed monster
Go pee pee
Leak the lizard
Number one
Pass water
Piddle (considered a coarse expression in some quarters)
Piss stop
Pointing Percy at the porcelain
Release the pressure
Relieve yourself
Seeing a man about a dog (or a horse)
Shaking hands with the vicar
Sprinkle
Tinkle
Steering Stanley to the stainless steel
Syphon the python
Taking a leak
Taking a pee
Taking a piss (considered a coarse expression in some quarters)
Taking a slash
Taking a whiz
Training Thomas on the terracotta
Twinkle
Visit Uncle Charley
Void my bladder
Write my name in the water

Defecation

Blasting a dookie
Dropping a bomb
Dropping some friends off at the pool
Dropping the kids off at school
Filling the bowl
Giving birth
Going poop poop
Launching torpedos
Laying a cable
Making logs (or a log)
Making waves
Makin' bears
Number two
Pebble-dashing the porcelain
Pinching off a loaf
Pinching a yam
Taking a brew
Taking a crap - see also Mr. Thomas Crapper
Taking a dump
Taking a shit (a coarse expression, not a euphemism)

Flatulence

Blow a big one
Blow off
Botty burp
Break wind
Cut the cheese
Drop one's guts (as in "Who dropped their guts?")
Fart
Grunt (as in "Who grunted?")
Let off a howler
Let off a stinker
Let rip
Pass gas
Pass wind
Trouser cough

Vomiting

Barfing
Blowing chunks
Bow down before the porcelain god (On some occasions, the worshiper vows to the god never to drink again.)
Chunder
Feed the fish (when seasick)
Park the tiger
Snow bank pizza
Spewing
Talking to Huey (or Ralph) on the big white phone
Talking to the porcelain telephone
Talking to the weeds
Technicolor yawn
Yakking
Yorxing

Ambiguous

Going to the can
Going to the loo
Going where even the king goes alone
Paying a visit
Powdering one's nose
Taking a biological break
Taking a constitutional
Using the facilities