Top Definition
when yours best mate makes moves on your girlfriend behind your back
I just did a cowper

im a cowper

#cow #cowper #per #wer #meeeeeeer
by Trevor "Wanker" Cowper April 04, 2009
someone who is really ugly/annoying!
oh god they are such as cowper!
#ugly #butters #annoying #burnt victim #minging
by Bossart January 03, 2008
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