repetitive tapping or clicking

Gum popping
Nose picking
Finger tip drumming

cell phone use? One that drives me crazy iis when I take the grands to the park, parents with kids that cannot take the phone away from their ears. Can't they get off for just a few minutes to spend time with the children. If it happened to be an important call, so be it. But most are on the phone chit chatting with friends and not even paying an attention to the children.

tardiness

Hm. I always took him to the park to play with kids his own age and not with me. I already spent so much time with him, he needed to form those relationships, and to learn how to just be him without me. I always read a book. Guess we all have different objectives! Probably would read a book on tablet now. I might look like one of those on the phone...

:)

Many of the above but for me the most annoying is someone talking too loud on his or her cell phone. I don't want to hear your conversation. My hubby is guilty of this.
Mary

Finger/joint popping
Gum Chewing
Talking with food in your mouth
Loud talking

talking constantly, can't get something in there edge wise.

Another vote for gum popping.
Biting fingernails.
Twirling hair.
Sniffing when one should be using a tissue.....you know what I mean!

posting selfies (for the techno people)

Always being late.

Public spitting
Also agree with snot suckers!