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1.
Doffin is the act/art of leaving a residual stamp on a girls forehead after she has completed a blow job. To qualify as a doffin the male receiving the blow job must exclaim "DOFFIN" in a high pitched scream as the stamp is administered.
Your mum asked me to doffin her last night. But i wasn't in the mood. We went bowling instead. Still pretty weird i guess.
by Dave Brubeck November 13, 2008
 
2.
Name given to a dessert/treat/sweet that results from the combination of Donuts and Muffins. Usually in a cupcake shape or form.
My wife made some tasty donut muffins (aptly named doffins). Please come and enjoy one.
by The Crucial Speller April 19, 2011