Blatching is the Quidditch foul of flying to intentionally collide with another player (QA6).
During their Round of 16 match in the Quidditch World Cup of 2014, a New Zealand Chaser, Dennis Moon, was sent off in the 106th minute after the Referee ruled that he had deliberately collided with Bogomil Levski, one of the Bulgarian National Team’s Chasers (QWC).
Lexicon list of Quidditch fouls
From the Web
WizardingWorld.com (Pottermore) features:
Screenshots of the Daily Prophet coverage of the 2014 Quidditch World Cup (originally from Pottermore), written by J.K. Rowling, and saved on Imgur:
- History of the Quidditch World Cup
- Quidditch World Cup 1990-2014
- Match reports and articles from the 2014 Quidditch World Cup
Harry Potter Wiki: Blatching