r u srs
a) humping the air.
b) doing the nasty.
Can be used in context of other people/things, like "herping her derp" or "herping its' derp".
a) Guy: Yo, did you see Miley Cyrus
herping her derp on that award ceremony last night?
Guy 2: Yeah, looked like she was having a seizure
b) "Yeah, I was herping my derp last night with that cheap skank
, I think I have AIDS
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