lack of balls
A wimp who talks trash about you like you're a ghost but screams like a banshee when you walk in.
My friend said I was a joke to my other friends, but when I walked in, he screamed like a banshee.
My coworker said I was a mess to my boss, but when I showed up, he was too scared to say anything.
My brother said I was a disaster to my mom, but when I walked in, he started crying like a baby.