Assroach 

Big fucking ROACHES that just let themselves into your house like it ain't nobody's business to scare the shit out of you when you least need it, and refuse to leave after you tell them to get the hell out of your overpriced apartment, especially in Charleston, South Carolina. Pretty much a cross between an ASSHOLE and a COCKROACH!
See also "Palmetto Bug"

While, at 5AM, Betty and Bob study for their 5 final exams for the morning:
Bob: HOLY SHIT! Was that a cat that just crawled accross your ceiling or was that the biggest cockroach I've ever seen?
Betty: Oh... that's just another assroach.

Assroach by Scared-shitless Yankee July 22, 2012

asscroachment 

The phenomenon that occurs when an overly large person sits next to you on a bus, train, or plane and their ass flows under the armrest into your seating area.

God, that flight was absolutely miserable; not only was it a small plane, but that big girl next to me was totally guilty of asscroachment since half of her butt cheek was in my seat.

Don't some airlines charge obese people for two seats to avoid asscroachment on other paying passengers.

asscroachment by Bubba Adbul Ledbetter November 16, 2009

Asspoach 

Asspoach (verb, noun) 1. To be envious of another person's bottom to the extent where you wish to steal it and have it surgically attached to yourself 2. More generally to covet a body part of another person 3. noun to be a person who frequently covets the body parts of another person.

1. "Hannah would certainly asspoach Kim Kardashian" 2." Angela was always asspoaching Pink's incredible abs." 3. (as noun) "My goodness," thought Dora, as she looked jealously at her friend's ample bosom, "I've become a real asspoach lately."

Asspoach by TypeA Girl December 13, 2014