Fanciful formations are informal words that usually derive from uncertain origins. But more often than not, they are onomatopoeic, imitative, frequentative, or just plain funny.
Examples: collywobbles; discombobulate; hornswoggle; izzard; loosey-goosey; namby-pamby; nincompoop; palooka; rumpus; skedaddle; snollygoster; sockdolager; spifflicate; wonky
