The paste like substance that is on a man's testicles when they either do not shower or perform various physical activities
by CMW9921 April 6, 2017
Me: Hey Jake what happened with you and that redhead?
Jake: It was sweet bro. I got all up in those brushfires down unda.
Me: That's fucking nasty dude.
Jake: It was sweet bro. I got all up in those brushfires down unda.
Me: That's fucking nasty dude.
by nutellacroissant February 27, 2020
1) Use of insider information in Australia to get something
2) Handshake with a cock (see also Handjob, Handie, Handjo,...)
2) Handshake with a cock (see also Handjob, Handie, Handjo,...)
"Use your down-unda-handshake to get us the information."
"I received a down-unda-handshake from that chick we met last week in Melbourne."
"I received a down-unda-handshake from that chick we met last week in Melbourne."
by AUtacobender January 17, 2014