Say I Won't
Pretty much asking for verbal encouragement from somebody else. Egging another person on to say "you won't," so you'll have something to say you did.
Example:
"Man, you aren't gonna actually tell that teacher she's a fat bitch who sucks the mailman's dick behind her husband's back, right?"
"Say I won't. Say I fuckin won't."
"Man, you aren't gonna actually tell that teacher she's a fat bitch who sucks the mailman's dick behind her husband's back, right?"
"Say I won't. Say I fuckin won't."