1896, of golf swings, from verbal phrase follow through; see follow (v.) + through (adv.). Figurative use from 1926.
I appreciated his follow-through on his promise
his follow-through was straight down the line toward the target
squash can be dangerous if your opponent has a long follow-through
follicle
follies
follow
follower
following
follow-through
follow-up
folly
Fomalhaut
foment
fomentation