The act of placing your hand between someones ass cheeks from behind, and flopping your hand side to side in a manner that resembles a guppy. One must shout "guppy" before executing the act; Forewarning is necessary to allow the victim time to clench cheeks and minimize penetration.
(noun) "I let my guard down while Jennie was behind me and she gave me a guppy."
(verb) "She guppied me so hard, I'll be walking with a limp for the next 24 hours."
Anything and everything magic. This word can pertain to either a magic trick or an actualmagician itself. If it's good, you can guarantee it's a guppy.
Wow look at that magicians over there! Did she just disappear into dust?! Wow she's so good!!! She is definitely a guppy!!
I don’t know about everywhere else, but in Australia it’s used as a derogatory word. Depending on the situation it could mean stupid, thick, ugly, or dopey. It’s really just a word to use if you don’t want to swear.