What does the phrase '痞痞的' mean? I tried to find out but I found that '痞' means constipation which I think would be highly unlikely in cases like this:

'痞痞的小小姐' or '痞痞的小家伙'
痞 means bad, eg, 痞子 is like the English word "rogue". I have seldom seen the phrase "痞痞的", but i think it would mean somebody is naughty, like a scamp maybe.