nope. Not devil.
When entering someone's house,
Ojamashimas. [ お邪魔します。]
*May I come in?
When asking permission to see someone tmr,
Ashita ojama shite mo yoroshii desuka. [明日お邪魔してもよろしいですか？]
*May I come to see you tmr?
When some pervert block your way, while kicking his arse away, shout,
J.A.M.A.! [邪魔! ] (dont forget your mean face.)