italian slang word, kinda meaning deflated or also used to say something or someone sucks or is stupid.
like if a guys erect cock goes soft, hes moo-shadda, or if ur brother does something stupid, you can say, "well the kids fucking moo-shadda" or if yah mothers raviolli sucks, you can say, "Ma whats up with these moo-shadda raviolli?"
This is the reply one should use when some idiot attempts to tell you how you shoulddo something you already deal with on a regular basis and that they have never experianced and know nothing about.
Mr. Knowitall was once again getting on everyones nerves by telling them how they should complete the job when one individual shut him up by blurting out, "shaddafuckup".
A Voltron ship that died long before the series took place but most fans still love it and hope for it and god, now I have 3 ships in the fandom...
Fan #286261: Shadam all the way!
Fan #248357: I think the ship name Adashi is much better!
*Fans bicker over better ship name*
Me: Guys! It's the same ship! Although I do like Adashi a lot better!
*Shadam ship name supporter those chair at my head*