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тёртый калач stresses
gen.	deep file; old dodger; a deep one; old sea-dog; old hand (Anglophile); old stager (Anglophile); old bird; wise/learnt old bird; smooth operator (Andrey Truhachev); well-seasoned man (Alexey Lebedev); no spring chicken (Albonda); slick customer; an old bird (SergeyL); cunning fellow; seasoned veteran (Ремедиос_П); person who has been around; experienced person
fig.	dodgy person (Andrey Truhachev)
idiom.	he is really savvy; old campaigner (Taras); a tough nut to crack (Andrey Truhachev); a hard nut to crack (Andrey Truhachev)
inf.	a tough customer (Andrey Truhachev); tough cookie (Andrey Truhachev); tough guy (Technical)
Makarov.	deep one; up to snuff
polit.	an experienced old hand (bigmaxus)
proverb	old coon
rude	old file
"тёртый калач"
idiom.	an old hand (Gretta)

тёртый калач: 8 phrases in 2 subjects

General	6
Makarov	2