A hood scoop that is attached to a car's air cleaner/intake manifold, and protrudes through a hole in the hood. Named such because it can be visibly seen shaking when the engine is revved.
Photographer: Hey Galway Advertiser social scene here. Would you like to be in the paper?
Ray:Ya Ya hold on and I get the brother as well.
Griff:Shaker Ray shaker.
The two brothers shake hands and smile for the camera in congratulatory style.
Ray: Now one more shaker with the wife.
A shaker is a guy who shakes his penis (by wiggling it) around the girl's vagina to enhance her pleasure. Most of the time they do it when she orgasm/squirts. It is a good sexual stimulation and very pleasurable (even for the guy).
Matthew is such a shaker. He loves to shake his dick on the girl's pussy when she's cumming.