Denotes a keenness or willingness to participate, in reference to a suggestion. It is generally said with contextually embellished excitement, and emphasis on the rhyming factor of the phrase.

This phrase draws its origins from the Pierrot, or 'sad clown'.
by mbryo_ January 24, 2011
mugGet the down like a clown's frown!mug.
Being on a friendly basis with someone who is generally depressing but still amusing.
"Hey isn't that that weird Kyle kid? He really brings down a room." - Person A
"Hold your tongue, hussy, I'm down with the clown frown." - Person B
by Appleanche November 09, 2014
mugGet the down with the clown frownmug.