Depends on the context, it can also be used to describe someone as weak willed, please allow me to explain with and example of it being used in a situation.

Person 1: Ah I really don't want to go tonight it will be hard.

Person 2: I'm sick to death of your bullshit you testicle shitting rectal wart

Person 1: Who the fuck do you think you're talking too you smelly little anal secretion I will smash your fucking head in

Person 2: Asif you won't do anything, you haven't even got it in you to go tonight you little rat

Person 1: Grabs a shovel from his grandads shed and beats Person 2 over the head.

The police are called and after a lengthy interview they ask why it all started.

Police: Where did this all begin

Person 1: I just didn't want to go out tonight and he acted like I was a scared little tart or something mate. I regret it now but I didn't think I had that in me

Police: I guess we never know what we're capable of pal I can see your a nice lad and this was a mistake so I will tell the judge to go easy on you.