Wiktionary
shiver my timbers
alt. Expressing surprise, disbelief or annoyance; mostly associated with pirates. interj. Expressing surprise, disbelief or annoyance; mostly associated with pirates.
Wikipedia
Shiver My Timbers
Shiver My Timbers is a 1931 Our Gang short comedy film directed by Robert F. McGowan. It was the 109th (21st talking) Our Gang short that was released.
Usage examples of "shiver my timbers".
I've seen some salt water in my days, yer land lubber, but shiver my timbers if I hadn't rather coast among seagulls than landsharks.
I was badly in need of alcoholic refreshment, and just as my tongue was beginning to stick out and blacken at the roots, shiver my timbers if Jeeves didn't enter left centre with a tray containing all the makings.