What is Slack Fanny?
1.
In Devon (West of England), an idle, slow and incompetent person who is no use to man nor beast. Just like a slack fanny (whether British or American), someone who does a poor job of whatever they are meant to be doing.
'That Pete's such a slack fanny. Three bloody years I've been waiting for him to look at my roof.'
See
Random Words:
1.
Someone who is not even good enough to be able to clean a hairy, smelly, infected vagina. Somebody who is maybe only fit to clean the do..