There are a lot of words that I know the meaning. Here are a few examples:
Blunderbuss - A gun with a flared muzzle.
Cantankerous - (this is what I can be) Testy, grumpy.
Collywobbles - Butterflies in the stomach.
Comeuppance - Just reward.
Discombobulate - To confuse.
Donnybrook - Melee or riot.
Doozy - Something really great.
Filibuster - Refusal to give up the floor in a debate.
Fuddy-duddy - Old fashioned, mild mannered person.
Gobbledygook - Nonsense, balderdash.
Hocus-pocus - Deceitful sleight of hand.
Hoosegow - A jail or prison.
Vomitory - An exit or outlet.
and, of course, Lickety-split, Maverick, Mollycoddle, Namby-pamby, Nincompoop, Ornery, Rambunctious, Rigmarole, Skedaddle, and Skullduggery.
These are the ones that I have heard and have probably used a few or more times during my life time. Just in case you are interested, a much larger list can be found at this website:
Now I know you all have used lots of funny words, some may only be heard in certain geographic areas, others are universal. Let me hear some of your favorites and have a great day, you hear?