Variation of the dutch rudder, in which 3 or more people link arms while each man in the group holds on to his own penis. Everyone in the chain then moves their arms up and down, causing each man's hand to stroke his penis under other people's control.
"Hey, how was the orgy last night?"
"Kinda slow at first, but then someone suggested we start a dutch longboat, and that got everyone loosened up."
Noun: a cat that is long, or, more notably, a white female cat holden by two hoomin hands that is so long that if she fought Tacgnol, the world would end.
Verb: to use an adjective twice in the same sentence.