"Pretty Fly for a White Guy" is the name of a song released in 1999 by the band The Offspring. From Wikipedia.....
"the song ridicules a "wannabe gangsta
" who is immersed in hip-hop culture
not because he truly loves or understands it, but because it is trendy, makes him feel tough ("Friends say he's tryin' too hard, and he's not quite hip
/But in his own mind, he's the, he's the dopest trip
"), and because he believes it attracts women ("and all the girlies say I'm pretty fly, for a white guy