aft

perä-

perässä, peräpuolella, perässä oleva, peräpuolella oleva puhekieltä The stern portion of a vessel.
puhekieltä At, near, or towards the stern of a vessel (with the frame of reference within the vessel).
located at the back of a boat, ship, or airplane
(label) (altform): the time of day from noon until early evening.
1898, The Hotel/Motor Hotel Monthly, Vol. 6, p. 27:

A gents' toilet room might be found in a house that caters for the cheaper class of theatrical patronage, where the slangy language of the "goin' to the mat this aft?" style prevails. A gents toilet room is not found in the Southern Hotel. It either "men's" or "gentlemen's".

"The best laid schemes o' Mice an' Men, Gang aft agley".