Using a soda fountain machine for water and old coke comes out first, then water.
A dirty squirt could also mean having sex with a woman in doggy style and when you pull out, old period blood lightly squirts out and stains your sheets.
I went to get us water after the movie, but it gave me a dirty squirt!
Or
Kate came over and she had a case of the dirty squirts!
where a person farts waiting for a partner to insert the penis in the ass. Penis is then rapidly withdrawn leading to flatulence, continuing until a flurry of Diarrhoea is emptied out of the hole and all over the person in question.
“no waybecky had tom give her a dirty squirter - it took weeks to wash off!”
The act of passing gas after anal sex where the semen coincidentally squirts out with the gas.
MAN: Why do you have that puzzled look on your face?
WOMAN: I need to change my panties.
MAN: Why?
WOMAN: Because you got back door action and I just had a case of the dirt squirts.
1. During sex, Crystal was partial to a finger or two in her dirt squirter.
2. After a short stint in prison, Kenneth sustained considerable damage to his dirt squirter.
3. Following an abysmal singing performance, Susan was kicked in the dirt squirter.