Top Definition
Putting your testicals inside a vacuum cleaner.
"did you hear what john did yesterday? he was totally doofing!!"

"duuudee. lets doof together!"
by greatday87 October 26, 2011
an extra large smile that consumes your face making you look doofy
guy: why u smiling so much girl: you called me cute guy: ohhhh thats y ur doofing ?
by monkey duckerson the third March 21, 2009
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