the opposite of cosign. whereas to cosign is to agree or support someone or their actions, to nosign is to disagree with someone or frown upon their actions. this word can be used by itself in reply to something (example 1), as a noun (example 2), or as a verb (example 3).
Justin Bieber/Shawty Mane: speaking in tongues, yabababfreiufher...
Other Person: NOSIGN.
Kanye West: i replaced my whole set of bottom teeth with diamonds and gold.
Other Person: that gets a nosign from me.
Person: hey, Other Person! i just found out that Justin Bieber made a rap video under the name Shawty Mane, and that Kanye West replaced his whole set of bottom teeth with diamonds and gold.
Other Person: i refuse to cosign either of their bullshit. in fact, i'm going to go so far as to nosign their bullshit.
This is a lesser known alias for the leader of the Ku Klux Klan. This refers to his alleged tiny stature, we gain from insider knowledge that he stands at 4'11. It is also rumored that he is unable to satisfy women. His bitterness from these factors is why he has orchestrated the most racist organisation in history.
Ryan: "Did you know notbigbrad, the leader of the KKK is 4'11"