In this context, "tripping" refers to someone acting "crazy," irrational, or losing their grip on reality due to ego or paranoia.
The opening lines— "First they ignore you, then laugh at you and hate you. Then they fight you, then you win" —are often attributed to Mahatma Gandhi. It reflects the struggle of the underdog or the arc of a controversial career. Robbie Williams - Tripping
Robbie Williams: Tripping (Music Video 2005) - Trivia - IMDb In this context, "tripping" refers to someone acting