A popular filipino word that is used by gay people in the philippines, it actually says as "150", P50 for blowjob and P150 is for fuck job, it is only used to gay people not girls if you're thinking if it's hetero...
The phrase said by a random anchovie multiple times in SpongeBob SquarePants in the episode "I'm Your Biggest Fanatic" whenever Kevin got stung by a Jellyfish. In the episode, Kevin was trying to get SpongeBob to get hurt in a "rigorous test".