[Hugin]

I don’t know what a “dongle” is, but it sounds vaguely pornographic.

[Defiant]

Actually, if you had a USB port, you’d love a big dongle.

[George from New England]

A dongle is a hardware peripheral with the only intent being to allow operation of software on said machine. Its goal is to prevent software piracy. i.e. the software won’t run if it can’t find the hardware dongle on the port somewhere.