English

flatbacker

From flat + back + -er, from spending time lying flat on their backs.

Formed from flat + back + -er

Proto-Germanic *flataz ‘flat’

Old Norse flatr ‘flat, level’

Middle English flat ‘level’

English flat

Proto-Germanic *baką ‘back’

Proto-West Germanic *bak

Old English bæc

Middle English bak ‘the back’

English back

Today it means

noun A female prostitute who services a large number of customers.

Language periods are conventional ranges, not dates for this word.

Etymograph / flatbacker