derisive
duh ri siv
- s  abusing vocally; expressing contempt or ridicule
                    
                        
                            
derisive laughter 
- He wandered through a derisive, if desultory, critique of Dick Cheney, then switched gears.
 - With a soul both pensive and explosive, equally capable of derisive laughter and hot tears, Leslie is all man-woman.
 - As soon as the questions began, Wright transformed into a defiant, derisive figure, snapping one-liners at the unfortunate moderator tasked with reading the questions and stepping .