Top Definition
a band that performed delightful music using simply toy instruments. alternative defn is the purple toy piano itself, the pianosaurus.
"hey bob, let's go see pianosaurus play tonight, right around the corner."
"honey, don't bang too hard on the keys or you'll break your pianosaurus."
by Regina February 17, 2004
The old pianist who has played at the hotel for forty years. Last new song he added to repertoire was in 1948, about the last time he purchased a new tuxedo.
"I thought that pianosaurus was extinct!" "Can't be! The hotel brochure says "Live Music Nightly.""
by Voltboy May 09, 2006
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