A dim-witted, oblivious and/or inattentive woman.

"dinghy" in this phrase is a shortened variation of dingbat and should not be confused with dingy (pronounced "din-jee") meaning dirty or soot-covered.
I'm not repeating myself a third time, ya dinghy broad!
by Legitimus September 23, 2010
Get the dinghy broad mug.
"Greer you're such a fuckin dinghy broad!"
by keith February 10, 2005
Get the dinghy broad mug.