"thumb" en el diccionario Collins English Cobuild & Thesaurus

thumb
n

1 pollex

2 all thumbs butterfingered (informal) cack-handed (informal) clumsy, ham-fisted (informal) inept, maladroit

3 thumbs down disapproval, negation, no, rebuff, refusal, rejection

4 thumbs up acceptance, affirmation, approval, encouragement, go-ahead (informal) green light, O.K. or okay (informal) yes
vb

5 hitch (informal) hitchhike

6 (often with) through browse through, flick through, flip through, glance at, leaf through, riffle through, run one's eye over, scan the pages of, skim through, turn over

7 dog-ear, finger, handle, mark

8 thumb one's nose at be contemptuous of, cock a snook at, deride, flout, jeer at, laugh at, laugh in the face of, mock, ridicule, show contempt for, show disrespect to