Definition of widdly in English:
widdly
adjective ˈwɪd(ə)liˈwɪdli
depreciative Of music or its performance (especially the playing of an electric guitar): showy, over-elaborate; noodly.
Origin
1980s; earliest use found in Smash Hits. Imitative of the sound of an electric guitar, probably after twiddle or twiddly.