Top definition
When you're so extremely tired that you begin to get loopy.
Oooh mannn I'm nerpin', I should probably sleep or I might do something bizarre.
by Milkywayyyyyy December 10, 2010
Get the mug
Get a Nerpin' mug for your grandma Yasemin.
2
It is what you call your nipples when they get hard.
Friend: dude, your nipples are hard.
Me: how about that, I'm nerpin.
by Dizymay_93 November 26, 2009
Get the mug
Get a Nerpin mug for your Aunt Beatrix.