Strange creature from Star Wars IV A New Hope. Bum Mouth obviously has a Bum Shaped mouth, and gets angry at luke skywalker in the Cantina.

Also, an asshole. Literally.
Man that ass is such a bum mouth
or

Kiss me Leia, I want your saliva to run all through the cracks of my Bum Mouth.

I need to lick a good Bum Mouth.

Do you really want to french kiss that Bum Mouth?

I really love you Bum Mouth, and I love to rub my tongue through your poopy crack.
by Arty Sims December 29, 2009
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The act of putting your finger up someones back c*** (bumhole) and then inserting that finger into that person mouth via fish hook method

(this is rather like the RUSTY FISH HOOK, however this method uses the victims bum aswell as mouth)
It was early in the morning, tom and jack were lying together semi naked. Whilst giggling, jack casually... BUMMOUTHED tom

After the BUM-MOUTHING, tom was visibly shaken and had to lie down
by Joedude20 September 27, 2010
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