2 definitions by modern wards

Trumping someone is yelling "trump!" after someone says they are going to do something, outrageous or not. If they do not complete this action after you have said "Trump!" you are allowed to slap them.
Trumping can be used in scenarios such as these:

"Ugh...I swear i'm gonna jump off a cliff!"

"Trump!"
"Crap..."

"I'm gonna pee myself!"
"Trump!"

"Crap..."
by modern wards August 28, 2017
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Usually considered 'rude' used to tell someone to be quite. Sometimes, shut up is used to express amazement, even if the person it is being directed to is not talking.
"Shut up Meg."

-Peter Griffin

or
"Shut up!"
"I didn't say anything..."
by modern wards June 24, 2016
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