Somebody who just did something really dumb and probably didn't think about it or did something dumb by accident would be "Rock Solid."
Let's say your friend just fell off his chair. You would say, "Haha, dude you're Rock Solid!"
by xUS3RN4M3x April 9, 2009
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Some stupid shit that some asscrack made up. It's SUCH a hispanic word, I mean jeez. OBVIOUSLY rock is solid. I'm sorry, but it's just like your stating the oblvious, and your OBLIVIOUS to it. Don't try to be cool and say rock solid, it sounds retarded.
like someone saying pillow soft, dude!! but only rock solid
by oblivious November 17, 2004
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(idiom)

1. Something or somebody which embodies exceptional awesomeness, is unparalleled in excellence. The most common usage of the phrase is to praise somebody who is unbelievably awesome in the face of daunting adversity (i.e., a doozy). However, people also use it in place of words like "cool" or "awesome" or "totally rad, bro".

2. An expression akin to wishing good luck to somebody on a difficult task.
1.

Person 1: Hey, did you watch the football game last night?
Person 2: No way, why would I want to watch our team lose against the Wildcats, they're the best team in the league. You know they haven't lost a single game in five years? They're undefeated!
Person 1: Well not any more!
Person 2: Shut up, are you saying we won?
Person 1: Hell yeah, we won 30 to 28!
Person 2: 30 to 28? But how?
Person 1: It was neck and neck throughout most of the game. When we reached the last thirty seconds of the final quarter, both teams were tied 28 to 28. They had possession of the ball, but in the next twenty-five seconds our defense pushed the Wildcat offense all the way back to the endzone. Our linemen broke through the offensive line, tackled the quarterback in his own endzone, scored a safety, and won the game!
Person 2: Holy crap, our defense is amazing!
Person 1: Yeah, they're pretty rock solid on the doozy.

2.
Person 1: Hey you wanna go to that cool party a few blocks down the street?
Person 2: No way bro, its finals week, and I have exams in all of my toughest classes tomorrow.
Person 1: Fine, I guess that I'm going by myself. Rock solid on the doozy.
Person 2: Thanks! Have fun at your party.
by Agricultural Structure March 3, 2015
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To have stability.
Thank you for your 'rock-solidness' today.
by Galahadoc November 21, 2008
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A task or piece of work which is extremely hard.
'Hey bro have you done the math homework?'

'Nah man, I tried but it was rock solid'
by t-rectadactyl December 4, 2019
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Someone who's unreliable in every aspect and flimsy with their promises
"You know what? Whatever, all right. What the...
Whatever. I don't give a shit."

"Yeah, well, I'm still going. Are you going to come?"

"I'll pick you up still, but... I mean
The party's gonna be over by the time I get over there."

"Whatever. You know, it doesn't really matter right now because
You are rock solid."

- Dance Gavin Dance Rock Solid
by Atlasxx April 26, 2022
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