A gribbly or gribblies is a patched or wanna be patched motorcycle ride, usually riding a Harley Davidson or other sort of horrendous bike.

They are too cool for school or double hard to acknowledge you unless to do you over in some fashion.
Don't nod at them as you pass they are a bunch of gribblies and will ignore you like the rude gits they are.
by Duke76 September 06, 2018
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The thiccest ginger in town. He shagged bare gals when he’s on the sesh. If you see him in the street get indoors as quick as possible.
Geez man Harvey gribble will bang you fam. Man will sit on ur face and kill you
by George_vr_08 April 23, 2019
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A reference used when describing something nasty or incredibly disgusting.
"OMG, she is looking like she has the hibbie gribbles!" gross!
by Trust me, I'm a professional. October 16, 2010
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