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