Top definition
Humorous slang that can be used in place of "ew", "gross", "nasty", etc. Similarly, "ersh" or "ershy" can also be substituted to display disgust or displeasure with a person, object, idea, smell, etc.
Girl 1 "Did you see the new substitute teacher we're getting for tomorrow?"
Girl 2 "Yeah, he looks pretty ersh megersh... I wonder if he bathes...He looks pretty creepy too. Hopefully he doesn't hit on the girls in class."

Guy, "That's your boyfriend!"
Girl, "Ersh, whatever! That's sick!"
by xHellgirlx April 13, 2010
Happy St. Patties Day!