Idiom medium 38 / 51
“shoo-in”
i · The common misuse One wrong form
ii · What it meansTwo lines, no filler
From horse racing — a horse 'shooed' across the finish line, guaranteed to win. Not from footwear.
iii · Memory hookKeep this one
Shoo-in comes from 'shoo' (chase along), not 'shoe' (footwear).