Sluice

[Marquetta]

A sliding gate or other device for controlling the flow of water, especially one in a lock gate.

[Lizzy Liz]

v. to run an item lightly between [your butt] cheeks before you [present it] to another, normally done by waitresses or food service [personnel].

[Britney]

[private] word which has the same [meaning] as slut use this when girls are around. [see also] slu

[Mary Mallozziberg]

an artificial channel for carrying water, with an opening at one end to control the flow of the water