Someone who overestimates himself, believing himself to be something that he is not.
Origin: A friend of mine thinks he can "sing like a lark" but he sounds like ass.
Jonny is such a Buttlark, he cries like a baby, but he thinks he is really tough.
by Sam December 4, 2003
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Gently cupping your hand below ones butt cheeks and so delicately grasping ones butt cheek..
Whoa, Elliott was just definitely Buttlarking that hot girl!
by Mh3234 August 8, 2016
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