A reference to banging a chick with her feet up in the air.
Friend: how'd last night go?
Me: she totally put the helium socks on!!!
Friend: very nice!!!!
Me: straight to pound town!
When a man cums inside an asshole and that person in turn poops it back out on them. Preferably on the face.
Me: dude I came in her butt last night and she pooped it back on my face!!!
Friend: dude wtf. Gross!!! You let her give you a Mexican dumpster???