A woman who is generally not concerned with her appearance and doesn't make any attempt to look womanly or sexy. Frumps are very common in the Seattle area. They need not be overweight but commonly are somewhat "doughy" and are characterized by lack of makeup (except for ugly art-school or Goth-style makeup), poorly-fitted, unstylish clothing, general lack of muscle tone or a tan. They sometimes wear very bright red lipstick or substitute teacher cat-eye glass to make themselves even less appealing to men although they are not dykes. They'll often complain loudly that they can't find a man yet make no attempt to present themselves in a manner that might attract a man (showing skin or cleavage for instance). They might even be somewhat attractive (do-able)if they made an attempt at dressing better and wearing makeup and/or a better hairstyle.
Wynonna Ryder is an example of a well-known frump (don't you hate the way she hides those awesome gland bags of hers beneath baggy shirts?)

I saw a group of frumps out for a walk wearing parkas and "Seattle Sombreros" (an ugly Gore-Tex rain hat) walking at Pike Street Market on a rare sunny day in Seattle.
by Mr. Tapeworm May 25, 2006
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It is when the penis is semi erect and is still able to flap around you slap your sexual partner with it while releasing cemin.
Frump me daddy harder. over time oh yeaaa. Frumping frump you are pretty much slap boxing with a penis
by logtubatoaster1997 February 6, 2017
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To be ditched by a friend who used you used to hang out with a lot.

Derived from "friend-dumped"
Person 1: Hey, you and Molly used to hang out a lot right? What happened?

Person 2: Yeah, I got frumped pretty bad. We don't really hang out anymore.
by Frumper Unlimited June 13, 2009
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The act of smelling a females bike seat after frequent sweaty use.
Drew went frumping around the local park.
by Ted_Nugent August 13, 2009
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A person who dresses as an old woman
The verb "frumpy" is to dress as an old woman

by fazzwazzer June 27, 2003
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(verb) A sexual act performed by two persons with a combined weight of over 400 pounds.
"Did you hear Andrew frumping that chick he met at ATO last night?"
"Ya shit was nasty, I was afraid the bed would break"
by 215man September 10, 2009
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a state of generalized depression
I have been in a frump all day today
by Eva McCombs October 8, 2006
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