The hands of a grandma, or one who schmooks.
Press harder! Use your grandma hands! Schmook it down!
————— Miss Kristine Iturrino
The act of shaking someone's hand with a very loose grip. Can also refer to picking up an object with a loose grip or reaching out both arms and running towards someone with arms outstretched, hands dangling in front.
John: Damn, Jack totally grandma handed that apple.
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Sexual act when you masturbate, cum, let it dry on your hand, then masturbate again.
Grandma's Hands: Jerking off into your hands then letting it dry and doing it again