Stands for the phrase "Fuck You Pussy Ass Hater You Should Do You" from the popular song "Ransom" by Drake ft. Lil Wayne. If you wish to use this phrase in a text-message or instant messaging, you can use this acronym instead.
"cause I done came I’m mo’ fire than a dragon fight
fuck you pussy ass hater you should do you (FYPAHYSDY)
you ain’t heard of me then you should go and get a Blue’s Clue" -Drake

or

"Yo you know what, I'm pissed off at you. FYPAHYSDY. lol."
by dmoney592 February 15, 2009
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