'Madao' is a word with a series of meanings, based from the manga 'Gintama'. The word bears many different meanings, but they are basically shortened Japanese phrases.
1.(ma)ru de (da)me na (o)ssan: good-for-nothing old man
2.(ma)jide (da)ssai (o)yaji: the really uncool old man
3.(ma)ssa ni (da)rusou na (o)yaji: really uncool-looking old man
4.(ma)ttaku (da)rakushite (o)ssan: really depraved old man
5.(ma)zui (da)shi to (o)age: horrid bean curd
6.(ma)ttaku (da)ijobu ja nai (o)kyaku: customer who's really not all right
7.(ma)tomo ni (da)karetakunai (o)toko: men no one wants to date
8.(ma)ji de (da)kaetai (o)toko: man one seriously wants to date
9.(ma)ttaku (da)masenai (o)toboke: fool who unconvincingly feigns ignorance
10.(ma)ssugu ikite no (da)inashi na jinsei na (o)jisan:
old man who lives as he wants, but accomplishes nothing
I dont know if you noticed, but my Most favored anime : Gintama
1.(ma)ru de (da)me na (o)ssan: good-for-nothing old man
2.(ma)jide (da)ssai (o)yaji: the really uncool old man
3.(ma)ssa ni (da)rusou na (o)yaji: really uncool-looking old man
4.(ma)ttaku (da)rakushite (o)ssan: really depraved old man
5.(ma)zui (da)shi to (o)age: horrid bean curd
6.(ma)ttaku (da)ijobu ja nai (o)kyaku: customer who's really not all right
7.(ma)tomo ni (da)karetakunai (o)toko: men no one wants to date
8.(ma)ji de (da)kaetai (o)toko: man one seriously wants to date
9.(ma)ttaku (da)masenai (o)toboke: fool who unconvincingly feigns ignorance
10.(ma)ssugu ikite no (da)inashi na jinsei na (o)jisan:
old man who lives as he wants, but accomplishes nothing
I dont know if you noticed, but my Most favored anime : Gintama