Laxative prank on dad is a video posted on the William's raging series playlist and is the 45th video on the playlist.
The video begins with William wanting to get revenge on his dad for putting hot sauce on his spaghetti. So they go to Walmart and buy Laxative. Then, William goes and pours a bottle of Laxative on a milkshake and stirs it. They go to the house to give to his dad. Bill liked it at first, but he gets explosive diarrhea and has to use the bathroom. William tells Bill it was a prank and he gets mad. The rest of the video is William teasing his dad and William's mom saying it might go too far.
While many people were disappointed that it wasn't Andy's revenge video, many people admire the revenge video saying Bill deserved it for putting hot sauce in William's food.
Some people were predicting what Bills revenge video is or when Andy's revenge video will be released. There has also been rumored that this can be the start of the prank wars.
- When Bill is asked how he feels, to which he responds, "Like shit."
- This is the first time Bill uses his infamous quote, "Freaking dingbat!"