When one talks confidently about a possible situation that might arise and then when the situation actually happens they get mentally tasered
, or handle the situation completely different from how they claimed they would, usually by whoever they were talking about easily "over powering" in the situation.
John: This isn't a good idea. I got pulled over by a cop last night for staying out past curfew like this skating.
George: Ha! Wow you're a pussy. Stop worrying. If a cop even tried pulling me over for that I would pull out my knife and cut his ass.
*Red and blue lights flash and a police officer approaches the 2 of them*
Cop: What are you two doing out this late? It's past the local curfew.
George: H-hello officer we we're j-just taking a walk and enjoying th-the weather.
John: Wow, so much for acting like a tough guy huh George?
George: Shut up I got mentally tasered