[PcChip]

I've used it since that simpsons episode

"it's a load bearing poster..."

[jghn]

I'm pretty sure that's not the source for me but most of my vocal quirks have origin stories like this so it's entirely possible. They're almost always things that I heard which either amused me or I thought sounded cool at the time and just stuck with me.

[crabmusket]

I have a bad habit of doing this with things players have said on Just A Minute and have just lodged in my brain.

[pseudohadamard]

And any petrolhead will be familiar with the phrase "it's structural rust".

[koolba]

Which is a perfectly cromulent usage of the phrase.