This one-liner may be used during an alien invasion, especially when you're a badass who is out to kill the beasts from outer space.
It is also possible to get the phrase as a dirty joke, according to the youtube celebrity Jesse Cox from the youtube channel "OMFGcata", who first came up with this sentence during his playthrough of the game "Crysis 2".
You kill an alien with your mere hands. You mention that you are choking a squidhead. You throw his corpse away.
Squatting and pissing at the same time. Mainly done by inebriated females in bar parking lots, drive ways, bushes or near an IHOP, Waffle House or Denny's in the tri-state area.
"Look at that drunk ho squissing in my yard!"
"She got so drunk, she squissed on Dan's cat cause she thought it was a rug!"
"Hey baby, hold up cause I gotta squiss behind this tree."
Basically a mommy's boy. He appears to be a bit fruity at times and likes to be babied. He's a softy but not in a good way. He also may be a bit of a chicken.