Any person who is weak in the arms. Limp ass noodle armed. Their strength and effort to lifting an object is equal to slapping wet noodles at an object and expecting it to be lifted where it is needed.
"Hey can you help me lift this up?"
"Yeah sure ill give it a try."
*Embarrassing failure*
"Wow you fuckin' skettie armed fuck. You couldn't lift that up even if your arms were al dente."