1 definition by mrmrmonkeynibbs
Making a claim or offering an opinion on a subject for which you have absolutely no experience or knowledge; Talking out of your ass; Derived from the surname Trump for obvious reasons. Always capitalized to distinguish from the homonym trumping.
-"I hate my brother-in-law . All day long he's Trumping online about economic injustice and he drives a fucking Bentley!"
by mrmrmonkeynibbs August 14, 2015