fidg·et 
/ˈfɪʤət/ verb
fidg·ets; fidg·et·ed; fidg·et·ing /ˈfɪʤət/ verb [no obj] : to make a lot of small movements because you are nervous, bored, etc. : to move or act in a nervous or restless way
▪ He was constantly fidgeting in his chair.
▪ He was constantly fidgeting in his chair.
fidget with [phrasal verb]
fidget with (something) : to move or handle (something) with your hands and fingers in a nervous way
▪ He was fidgeting [=fiddling] with his tie before the presentation.
▪ He was fidgeting [=fiddling] with his tie before the presentation.
