Spunkenzwunk
A word not even Google knows! Spunkenzwunk is a very universal word, similar to "stuff", but you can also use it to cuss (see examples).
(looking for something): Damn, where's my Spunkenzwunk?!?
(you see your best friend fucking your gf): Get the fuck outa here you shitty Spunkenzwunk!
(you see your best friend fucking your gf): Get the fuck outa here you shitty Spunkenzwunk!