To bad mouth/disrespect/give someone cheek, to their face or behind their back.

Can be used both in present and past tense.
"Ow! Stop chopsin to me!"

"That cheeky cunt was chopsin to me on the bus the other day."
by Misazoppizi February 17, 2009
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the definition of this is the same as dissin or to diss someone
stop chopsin me!
it was well funny she was chopsin him all night
by googlewhack December 21, 2004
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