A
speedy touch of a man's member, schlong,
knob, etc.
While it is not very satisfying, it can be a hopeful prospect, and is convenient for rushed situations.
A)
Johnny: "Yo
Frank, you get your dick wet yet?"
Frank: "Nah, just a lil tippy touch"
B)Lisa: "Hey Sam, could I get a pen?"
Sam: "Course, how bout a quick tippy touch though?"