look up any word, like rimming:
 
1.
someone gross, whom you do not like.
Matt is so ugly, and he keeps hitting on me, i mean WTH, he is such a nasto!!
by Frieda + Liezel August 19, 2008
 
2.
very gross and nasty. the grossiest thing. makes you wanna barf.
"Chris we are having cabbage for dinner"
" ew mom. nasto"
by Colleen Bo Bean April 11, 2008
 
3.
someone nasty, perverted or ugly looking.
grossfreaky
Oh my god! You're such a NASTO!!!
by ShoujoStephie May 12, 2004