Fun, alternative way to express mild annoyance, etc. Similar to darn it! Example: Foof! I left my favorite shirt at Lester's house. Knowing him I'll never see it again. Or, if I do, I'll never be able to wear it again. He'll wongull it, fer sure.
FOOF
Meaning of FOOF in English
Slang English vocab. Английский сленговый словарь. 2012