(verb) To accidentally mangle the pronunciation of a word due to lingual clumsiness. This happens when you stumble over a word you can usually pronounce, or when you find a specific combination of sounds you simply cannot make yourself pronounce.
Person A: Hey, what are you doing Febury 15th?
Person B: Did you just say "Febury"? Man, you rubberlipped that.

For some reason, every time I try to say "procussion" I rubberlip it into "pocrussion" instead.
by Talmanes May 4, 2007
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