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When someone, such as your parents or friends, are looking at your monitor while you're doing something secretive (eg. talking to a boy/girl you like, watching porn, etc.)
(Patrick is currently chatting to a girl he likes while his Dad is looking at his computer screen to see what they're saying)

Patrick: Dad what are you doing?
Dad: Sorry son, I was just mondropping to see what you were doing.
by irkcirtap March 11, 2009
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