Top Definition
Entering a public toilet and using the facilities improperly; often involves leaving faeces in the toilet bowl without initiating the flush mechanism.
"See that bloke over there, the one with a newspaper, he is doing a John."

"Dirty bastard"
by Graham Marsh October 22, 2004
7 Words related to Doing a John
Lusting after a young girl with the intention of postponing a sexual proposition for an undetermined number of years.

Often the perpetrator will announce the number of years he intends to wait in a grumbled tone.
So my little sister just started junior school. Yeah, she is doing really well, better than I was at that age. Hey John, I won't be in lesson because I've got to go and pick her up at three.

Four more years...
by Graham Marsh October 24, 2004
to unexplainably lose all your money in five hands of poker
'Damnit five hands and im all out!'
'shut yo jibba jabber and stop doing a john!'
*crys then begins to masterbate*
#john #poker #money #hands #texas #lost #bankrupt
by lewis B October 01, 2007
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