Top Definition
Headbutt-asaurus also known as "big ass head" not havingsecond much brain,or alot of space around the small brain.Very Ugly in appearance. Also know to been hit with an Ugly Stick repeatedly. Also known to inflict pain or death by way of headbutting its prey. Headbutt-asaurus may have small feet with large hands, can be female or male or both. They also eat many Burritos & drink lots of coffee. Also tend to write on whatever whenever.
ME-"oh no! here comes a Headbutt-asaurus"!
Headbutt-asaurus (female version) ra ra ra rew!! (in manly voice)
by fknblown August 19, 2011

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