Tight friendship between two dudes

• Bond in some buddy movies
• Intimate friendship between two guys, slangily
• Buddies have this non-British party in British city
• Relationship in many a Seth Rogen film
• It may grow between buds
• British novel about the end of one chap's relationship with another
• Modern-day male bonding

Wikipedia Word definitions in Wikipedia
A bromance is a close, emotionally intense, non-sexual bond between two (or more) men. It is an exceptionally tight affectional , homosocial male bonding relationship exceeding that of usual friendship, and is distinguished by a particularly high level ...