Cyrus Christie's second-half strike condemned Cardiff City to a second straight defeat under Sabri Lamouchi and deepened the Bluebirds' growing relegation worries.
The Tigers were good value for the three points at the MKM Stadium right from the off as Regan Slater's deflected effort cannoned back off the post after just 13 minutes.
Cardiff, not for the first time this season, offered precious little in terms of attacking threat, but were handed a golden opportunity to take the lead against the run of play after Jaden Philogene was brought down in the box.
Robinson, stepped up, but was denied from the spot courtesy of a fine save from Tigers goalkeeper Matt Ingram.Hull responded after the break, and took the lead just after the hour, with Christie cutting in brilliantly from the right before curling home a lovely strike into the top corner of the net to seal all three points for his side.