Top Definition
to quickly and easily make things up, (particularly when it comes to the definitions of words); bullshit out of reflex

John: People who use big words to describe simple things are sesquipedalian assholes.

Nicole: What does sesquipedalian mean?

Ern: Isn't it like a 70 year old squid?

Harvin: Erin, ad-glib much?

John: Ern, your retarded.
by Ern Lee Ermey September 14, 2008

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