A portmanteau of "trashy", "slut" and "fashionista". The word "slut" is omitted as it can't fit in fashionably.
It is used to denote a trashy whore, slut, skank, and occasional MILF who happens to dress fashionably like a supermodel. They are easily identified by their trendy clothes and willingness to work something out with the same sex in case two are not enough.
Sara: Hey, stranger. What say you and me in the stall two doors down? Rawr.
Mark: Eh...I have a girlfriend.
Lexi: Mark! Why is that trashionista putting her hands on your junk?!
Sara: O, are you and him together? I'm sure we can work something out.
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A female who has highly defined biceps likened to that of males. Said female most likely also has a very defined six-pack, more defined than your boyfriend's in fact.
It is often the sign of a lesbian, any woman who practices Wing Chun, or Ms. Universe.
Mike: Man, check out that girl's guyceps!
David: I now know why they call it Manchester.
"Hey, did you see how hot that girl was?"
"Dude, she's tots a lesbo."
"Just cause her name is Leslie---"
"Duuuuude, guyceps. DUH."