Okay c'mon guys shes new!
Authentic's video was humorus for many of us but you did ask a valid question. There is a reason you dont know those signs. He is signing innapropriate things and saying they are everyday terms. So really, truly, dont pay attention to, or try to learn from, that video! Its kind of like a tattoo artist ginvign someone a Kanji tattoo. Its supposed to say "Destiny" but it really says "Dumbass" or something of that nature.
Dont let the occasional off-color humor around here make you scared to ask questions and be involved. The only way to improve is to practice!