In New England we have wiggly teeth rather than wobbly teeth.
In Scotland we have shoogly teeth. You can kind of see where that came from.
Why is it m'? Is it because fhiaclan starts with a vowel sound rather than an actual vowel???
Yes. The m' (with a space, note the difference from English I'm, Welsh dw i'n, French l'oeil, and even Irish m'athair - thanks silmeth) is compulsory before a vowel sound. As fh is silent you have to look at the next letter.
Ok, thanks for clearing that up.