There's no flies on

no flies on (one)

One is very active or works at a fast pace. Alludes to the idea that flies do not or cannot settle on fast-moving animals. There are certainly no flies on Judy. She works so fast that the rest of her team can't keep up with her.
See also: flies, no, on
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

There's no flies on someone

. Rur. Someone is full of energy and drive. There's no flies on Jane. She's up at five every morning, training for the big race.
See also: flies, no, on
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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