pinky promise.
Comment on 'make a deal by taking fingers' - a bit bloody.taking fingers = cutting off fingers and take with you.It is not usually express that way unless you are a kidnapper wanting to express how serious your intention is.
（两人）勾手指的英文怎么说?冲上云霄2第四集中sam和zoe离别时说了这句,但没听清……