shakin' in my boots 

1) scared of the events to come

2) sarcastic for "not intimidated at all"

1) He held the gun in my face: I was shakin' in my boots.

2) "I am shakin' in my boots," Fred told his boss as the boss tried to intimidate him.

shakin' in my boots by Doctor Holiday March 28, 2007

shakin’ in my gucci boots 

An expression of extreme fear

“Are you ready for the orgasmicon”
*sylvester stillone gulped*
*kermit the frog stood shakin’ in his Gucci boots*

Shakin’ In my Gucci boots

shakin’ in my gucci boots by Ooey Gooey May 4, 2018

shaking in my boots 

SHOOK!!!!!!
SHE JUST TOLD ME THE TEA!!!!!
PRESSED ABOUT THE NEWS
DILEMMA

BRUH HE REALLY DID THAT??? I'M SHAKING IN MY BOOTS SIS!!

shaking in my boots by DRIPPYGAL02 July 19, 2017

Shaking in my space boots 

The same as shakin' in my boots, which means scared. The phrase is used sarcastically often.

The specific term comes from Austin Powers in which Dr. Evil says "I'm shaking in my little space boots", although some falsely attribute it to Toy Story. Also, the "little" is commonly skipped from the phrase.

Thug: "We comin to get chuuuuu"

Girl: "Oh mann i'm shaking in my space boots"

Shaking in my space boots by blaqq September 20, 2011