A snitcheruse
You're about to get someone in trouble, but they already got you in trouble first.
I was going to tell the cop about my dad's parking tickets, but my dad already told the cop about me stealing his hat.
I was going to tell the coach about my teammate cheating, but my teammate told the coach about me stealing his sneakers.
I was going to tell my mom about my brother eating my sandwich, but my brother told my mom about me eating his chips.
xs