"NOOOOOO!" groan or even a delicate "no..." mumble. 'No' moments are usually caused by alcohol and cringe-worthy social situations.
"Awww... NOOOOOOOOO!! ARGH"
"Was that a 'no' moment?"
"Aye, it was"
This results in him screaming, 'NOOOOOOOO!' obnoxiously and being too frozen in place to actually do something about it.
These moments are usually frowned upon by self proclaimed, 'CRITICZ' and are promply torn to pieces.
Girl 1: Oh noez, I've been stabbed, ugh...
Love Interest 1: NOOOOOOOOOOOOOOOO--
Evil Guy: >:)
Love Interest 1: --OOOOOOOOOOOOOOO!!!!
Fangurl 1: BEST NO MOMENT EVAR!
Critic 1: SHUT UP. >:V