cerca qualsiasi parola, ad esempio sex:
 
1.
A form of greeting someone without using words.
Like a normal nod but insteading of stating with your head going down, it goes up first.

Lads normally do it instead of waving.
"Josh just gave me an upnod while i made a tit of myself by waving" :(
di EJMC 14 febbraio 2009
 
2.
The silent sign of respect
No words were spoken, just a slight upnod was all that was needed. upnod.com
di jhicken 25 marzo 2010