The act of pressing one's bulge against something. If it's against an object use with [[humping]], if it's another person use with [[dry humping]] and [[bulge to ass]]. 

Against object examples: post #4716052 post #4656536
Against person examples: post #4092731 post #4192125

h4. See also
* [[humping]]
* [[bulges touching]]
* [[motion lines]]