The Bulgarian team’s Keeper, Zograf, fouled Irish Chaser Mullet with his elbows during the 1994 Quidditch World Cup final between Bulgarian and Irish teams, causing referee Hassan Mostafa to award Ireland a penalty (GF8).
The English word "cobbing" has several meanings, including (1) blows to the buttocks in a military context and (2) inferior building materials or shoddy building work.
Lexicon list of Quidditch fouls
From the Web
Writing by J.K. Rowling on Pottermore: History of the Quidditch World Cup
Pottermore feature: Quidditch collection
Harry Potter Wiki: