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1.
When there is no other way to clean something up (without making more of a mess) than to suck it up with your mouth ,like noo-noo.
"crap I spilt coffee on my laptop and its between the keys!"
"Quick! just vacuum-mouth it!"
by Iamem February 23, 2012
 
2.
The act of streaching out your mouth to quikly inhale cookies (chocolate chip) and is streached atleast 6 inches longer than your normal mouth length. This technic is often used by fat people who want to eat a whole plat of cookies in under 5 seconds depending on the size of the jar, plat, bowl, etc. containing the cookies.
Did you see that guy vacuum mouth that entire plat of chocolate chip cookies?
by Bing Ordanate January 31, 2011