Nip-up - definition of nip-up by The Free Dictionary
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An acrobatic spring from a supine to an upright position.
a calisthenic routine or gymnastic move of springing to one's feet from a supine position.
References in periodicals archive
MY ELLY BAY WAS DOING NIP-UPS AND I HAD TO FIGHT TO KEEP FROM JETTISONING MY PANCAKES.
I don't have to do backbends and nip-ups
and cartwheels anymore," she says, "but I am very active.