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1.
Very uncommon name originating from England. People who come from the Dagnall family usually have a large penis, approximately 11-14 inches long, and are liked by anyone. Girls can't contain themselves around a Dagnall boy, for his large penis acts as a magnet attracted to vagina so his magnet penis ends up splitting the girls in two like a piece of wood. But this causes a lot of pleasure for the women and they don't mind sacrificing splitting their vagina for a shag with the Dagnall's huge shlong.
Look at Dagnall dragging his shlong across the ground again. I wish i was like Dagnall.
by The Daginator June 23, 2011
 
2.
A slang term for peruvian hat, mainly worn in birkenhead
also slang term for pointless jest
man look at dappy from n dubz - he has a great selection of dagnalls
get ur dagnall out
by van tasty loof February 06, 2009