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1.
Derived from dogging and also piking a carper is someone that speaks to someone on a mobile phone who is in the act of piking.

piking dogging ducking
Carrie innocently phoned Chris on his mobile, only to discover from his panting tones he was engaged in piking.

From that moment on, she knew she was a carper.
by Razzle August 21, 2004
 
2.
Carping or to carp; is when a fellow employee down talks you straight to your immediate boss to make him or herself look better.
Jimmy carped Brent by loudly making it known that Brent was ten minutes late for work, as a result of the carping Jimmy got the promotion not Brent.
by Mr. Sek C. January 11, 2012