Top Definition
Getting drunk, hammered, sloshed, trashed, fucked up, ratchet or extremely intoxicated.
You should have seen John last night, he got so Flatpattied he pooped his pants.

I can't wait to go out and get Flatpattied this weekend.

That girl is so Flatpattied she can't even form a sentence.
by JimboMFJones August 20, 2013
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