To text another persons spouse and try to have sexual relations with them. Generally when you sponaugling someone you send several thousand sexual texts to that married person. Generally one who sponagules is a douche.
Hey girl I know your married but I'm going to be sponaugling you later.
To describe how amazingsomething can be, a word used not everyday, as to be 'Spandangaling' something has to be legendary, this can include how hilarious or memorable something will be.
David scores a goal on FIFA, on legendary difficulty, using a goalkeeper...
David screams 'SPANDANGALING' whilst dancing in his man cave.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi