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The idiom in question is the ending -fu (wiktionary)

Suffix[edit]

 

-fu

 

(slang) Used to form nouns indicating expertise or mastery of specified skill or area of knowledge
My Google-fu is weak!
Aragorn uses Ranger-fu to figure out that Sam and Frodo have taken a boat.

It comes from kung-fu, most commonly seen as google-fu

The idiom in question is the ending -fu (wiktionary)

Suffix[edit]

-fu

(slang) Used to form nouns indicating expertise or mastery of specified skill or area of knowledge
My Google-fu is weak!
Aragorn uses Ranger-fu to figure out that Sam and Frodo have taken a boat.

It comes from kung-fu, most commonly seen as google-fu

The idiom in question is the ending -fu[6]

6
-fu
skill
"Your kung-fu is good, but still!" "Your driving-fu better be pretty good if you're going to win the race."

It comes from kung-fu

The idiom in question is the ending -fu (wiktionary)

Suffix[edit]

-fu

(slang) Used to form nouns indicating expertise or mastery of specified skill or area of knowledge
My Google-fu is weak!
Aragorn uses Ranger-fu to figure out that Sam and Frodo have taken a boat.

It comes from kung-fu, most commonly seen as google-fu

The idiom in question is the ending -fu[6]

6
-fu
skill
"Your kung-fu is good, but still!" "Your driving-fu better be pretty good if you're going to win the race."

The idiom in question is the ending -fu[6]

6
-fu
skill
"Your kung-fu is good, but still!" "Your driving-fu better be pretty good if you're going to win the race."

It comes from kung-fu