One pump and done. The first word, in this case single, represents the number of pumps needed to cum in a girl. A double jingle would be interpreted as using two seperate pumps to finish.
A single jingle must provoke a sense of pride such as, "BOOM! YEAH BABY!"
You have to mean to do it, if you don't it's just pre-mature ejaculation.
"I single jingled her five times last night; she was not happy."
"Baby, you ready for a single jingle?"
Chick - "God damn it, was that a single jingle?"
Guy - "BOOM! YEAH BABY! SINGLE JINGLE."