Top Definition
A sexual act that combines a pterodactyl (see definition) and a blumpkin (see definition) i.e. everyone is shitting. In order to perform this task you must have an unusual arrangement of toilets, 2 other friends, and a skankasaurous rex (see definition).
My two buddies and I got a blumpadactyl last night. That's it.
by a doucher April 27, 2011
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