If someone says "you smell like milk," it means someone thinks you've "just been suckling from mother's tit", which is meant to imply that you're naïve, young, unqualified, or innocent.
Slang term typically used in urban ghettos and popularized on internet memes to mean : To act like, or to appear in a certain way, to say, or to offer up an excuse.
Girls be like, "I hate when guys stare at me at the gym."
Bitches be like, "You want my number? What kind of car you drive?"
To have a really good time. The reference is to late dwarf actor Billy Barty, the 3'9" man who, despite his diminutive stature, was renowned for his long showbiz career and effervescent character.
When my exams are over, I'm going to party like Barty.