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1.
tattling, snitching, telling on someone.
I will never forgive you for dobbing on me.
by Yibble August 31, 2009
 
2.
The art of wiping one's pre-seminal fluid (or pre-cum) onto a dates clothing or person without her noticing.

Very often a succesful nights dobbing will leave the young lady in question wondering why she smells of wank.

Me and my mates went out dobbing last night, and I got an extra 50 points for making a smiley face!
by Artha September 14, 2007