look up any word, like the eiffel tower:
 
2.
po-lice, pigs that carry out a sting or jack
when the mopes saw dem knockos they bounced but the new jack caught a bid.
by PISAN December 29, 2004
 
1.
police narcotics officer
Don't talk to him, he's a knocko.
by Jim King December 15, 2004
 
3.
` undeR coveR copsss
- here come the knock o's !
by chillout'handsome February 23, 2010