The phrase "arm poking" is correct and usable in written English.
It can be used to describe the action of poking someone with an arm or to refer to a playful or teasing gesture involving the arm.
Example: "During the meeting, she couldn't help but engage in some lighthearted arm poking to get her friend's attention."
Alternatives: "elbow nudging" or "arm jabbing".
This is perhaps most evident in "The Guitar Player," where the image of a man with one arm poking through a piece of Astroturf — which he holds like a musical instrument — is subtly sliced and torqued.
A low wooden table figures prominently as a burden to carry heroically, an object to masturbate against and a curved shape to trace and augment with the rounded top of a head or curving arm poking up from behind it.
The other forms of request such as vocalizing, clapping hands, and beating the panel, were often performed in combination with arm poking and/or placing a hand at the entrance of the hole and/or looking at a potential helper, which additionally indicated that the request was directed at the conspecific partner.
With a group of reporters in a semicircle around him, an arm poked through to shake Keenan's hand.
Elsewhere, Doubting Thomas's hand, mounted on a mechanical arm, pokes violently at Christ's torso, itself mounted on a giant spring.
The arm pokes out on the side of the bun and is linked to a docking port.
Haze's slender arms, poking from a loose shirt, clutch her legs.
Sykora said that at times this could be any major volleyball tournament, with the same teams, the same long arms poking at them.
In another room, two chairs sit in front of a huge, daft, pink sculpture that hangs suspended from the ceiling like an asteroid, a giant virus or a Sputnik, with long arms poking into space.
Thirty-five years old, hair in a practical bob, mommy arms poking out of a brightly patterned Lilly Pulitzer shift.
His tattooed arms poke out of a dingy white T-shirt.
