(as) tough as old boots
US /əz tʌf əz oʊld buːts/
UK /əz tʌf əz oʊld buːts/

1.
kuat baja, tangguh
very strong and able to deal with difficult situations
:
•
My grandmother is 90 years old and still (as) tough as old boots.
Nenek saya berusia 90 tahun dan masih (se)kuat baja.
•
You need to be (as) tough as old boots to survive in this industry.
Kamu harus (se)kuat baja untuk bertahan di industri ini.