noun, noun or participle which takes 'suru'
twisted towel headband
A towel twisted and tied around the head, often associated with determination or effort. Can also be used figuratively for getting down to work.
試験勉強の前に、彼はねじり鉢巻きを締めて気合を入れた。
Before studying for the exam, he tied a twisted headband and psyched himself up.
I tackle my work with a 'twisted headband' spirit (i.e., with determination).