when a girl who is nasty (un-hygenic,slutty) or who you just lack interest in who won't stop calling you,showing up in your daily life, coming to your parties uninvited, or just generally stalking you. more commonly refers to a girl you are not interested in who is all over you when you hang out with your friends.
gawd vickey was crazy festering at steve's party last night.
yeah I wish steve would stop inviting her, she's cute but I'm really into jane dude.
yeah, I feel ya.
what the hell?!?
dude that girl we met is festering on me man, she just texted me...
yuck, that girl is gonna make aids airborne, you seen that hoe?!
yeah I feel like a d-bag but I just HAVE to wash myself after she touches me...