bumptious

PRONUNCIATION: (BUHMP-shuhs)
MEANING:
adjective: Self-assertive in an obnoxious way.
ETYMOLOGY:
Probably a blend of bump + fractious or a blend of bump + presumptuous. Earliest documented use: 1803.
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BUMTIOUS - the attribute of having a shapely bum.
As in the song:
I can't dance
I can't talk
The only thing about me
Is the way I walk