floppy nuts
A condition when the testies overheat and sag down thus becoming floppy.
Man, hanging out in the hot tub gives me a bad case of floppy nuts.
Floppy Nut
The act of ejaculating with a fully flaccid wang
Man, I had to bang this chick for a favor but she was an uggo so I had to bust a floppy nut and dip