through thick and thin
in spite of any difficulties or problems

[TahlilGaran] Dictionary of Contemporary English ▲

through thick and thin
if you stay with or support someone through thick and thin, you always stay with or support them, even in difficult situations.
That's what relationships are about - you stick with someone through thick and thin.

She remained loyal to the party through thick and thin.

[TahlilGaran] English Idioms Dictionary ▲

through thick and thin
through all difficulties and troubles, through good times and bad times
The woman's husband is always ready to help her and supports her through thick and thin.

[TahlilGaran] English Idioms Dictionary ▲

through thick and thin
adv. phr. Through all difficulties and troubles; through good times and bad times.
The friends were faithful through thick and thin.
George stayed in college through thick and thin, because he wanted an education.

[TahlilGaran] English Idioms Dictionary ▲