An extreme or irrational decision or choice with little consideration for the consequences, usually because you're just so RASH
"Dude, buying this snake was pretty rash"

"In a moment of rashness I cut off my nose"

"Mate, I just drank four bottles of bleach!"
"Rash"
by assbandits December 18, 2012
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An irritation on the skin which induces either a burning or itching sensation. This same sensation and/or irritation can be felt on forums known as the handle: Rash or Rash The Bong Samurai
Rash ruins are chat and message boards with his racial slurs and redundant slanders.
by Michael Schmitt February 23, 2005
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Rashing it, (not to be confused with the skin condition), derives from the famous teenage video gamer; Robert Rash. He is widely considered as the "minion destroyer" of various video games, one being an MMORPG called Runescape. He is predominately known for killing minions of strong boss monsters (such as Nex), while his teammates do the rest of the work for him. Robert over-excessively uses slang terms such as "Kappa" and "M8" to get his teammates to do his own work. Although Robert is most commonly known for destroying minions, he is also known for his tedious work in the fletching skill.

One who "rashes" is considered a guru at killing minions in a video game, and most likely doesn't know how to PvM(Player Vs. Monster).
Justin: You literally attacked the minion and just ignored the boss monster, what's wrong?
Ralph: I don't know, I guess you could say I was rashing it.
by Beyond Burnt December 15, 2014
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Basically like lashing out , but picking on the smallest things.
An example of "Rashing" someone is by correcting your friends grammer and punctuation , like when she asks you a question but puts an exclamation mark at the end of her sentence .
by explicit content November 12, 2014
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to tell off, call out, or otherwise put-down/assualt verbally
best watch your mouth, 'for i gotta rash you
by charlie January 21, 2005
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An acronym for Red Anarchist Skinheads. The RASH are one of many different groups of skinheads. Members of this group contain: anarchists, communists, marxists, and other extreme lefts. The RASH reject all forms of racial prejudice and have no toleration for Nazis.
guy 1: Look at Eduardo, he's a skinhead who hates blacks, mexicans, and other minorities.

guy 2: No dude, he's a RASH.
by SLAYTanic March 4, 2005
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Really annoying, won't go away, ruins male friends and their balls for life, sucks life out of anything living in the immediate area. Also doesn't shut the fuck up.
Guy 1: "That Amer guy seems different"
Guy 2: "Yeah...he's got a really bad rash"
by ball licker girl May 3, 2010
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