She bollockses the presentation by skipping the important slides at the last minute.

By the end of the night, Mark was bollocksed and had to be helped home.

After the software update, the entire system bollocksed and we lost hours of work.

He's bollocksing his way through the presentation, making up facts as he goes.

He bollockses up every presentation because he forgets his slides.

I bollocksed up the presentation by forgetting my slides and running out of time.

By repeatedly ignoring the test results, she was bollocksing up the experiment and wasting months of work.