Top Definition
Gruffing is the act of wanking off a homeless man under a bridge. Its a reference to the popular childrens fairy tale the Billy Goats Gruff. Don't think there was any wanking in that though.
"Jimmy's been wearing a sling all week after a particularly vigorous Gruffing session."
by Paddyhahahaha May 11, 2010
To use lollypop sticks to pleasure your partners rectum area.
I was gruffing my mums son last night, it was awesome!
by loraa July 24, 2015

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