Slang, possibly from the end of World War II, but it was certainly used by the US Army during the Vietnam War. It means a heavy or awkward load in adverse or difficult circumstances.
When they first heard it, the expression “humpin’ the pig” the word humpin' caused a certain amount of consternation among reporters (see humping). The pig in question was not a pink bacon producer or an officer of the law but nickname for the M60 machine gun, so the grunt they were interviewing would have been a machine gunner.
-noun- a hump or bootycall that comes over to not only hump but hang out for a bit too. similar to a friend with benefits but s/hes not a really a friend, they are just good at pillow talk.
In World of Warcraft, in arena matches, to use pillars or other terrain to obstruct line of sight, thus restricting ranged attacks. This often results in long games or a defensive stalemate.
Rubbing your crotch against something for stimulated arousal and oral pleasure. Examples include humping your bed, the couch, the floor, pillow humping, and especially humping the body of another person.