Southern Ontario rural-ism, meaning, she is dumber than a dog... The longer version of the phrase, which is seldom spoken, is "She don't knowsick'em from fetch!"
Did you hear your Aunt Sue, arguing around the table with everyone?! There is something WRONG with that woman! She don't know sick'em!
When your problems,especially your love-life, get too much for you and you, unexpectedly, 'throw-up' all the stuff going on in your life and through your mind over a friend (a third party). Neither of you expected it to happen and at least you feel better for it afterwards though your friend often wonders what they had done! Probably made the mistake of asking "What's Up?". Usually easier to do thru email or text as they can't stop the onslaught!
I think Annie's love-life has all got too much for her, Jane's just told me she was emotionally sick all over her when they met.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.