|1.||thank you hand|
The hand someone raises when they are driving and someone lets them in, or sometimes used when someone cuts a person off and then has the nerv to 'thank them', even if it was not the driver's intention to let them in.
Raise the thank you hand when someone lets you in to their lane even when it would have been so much more convenient to them to not let you in. Be polite.
That asshole raised the thank you hand to me when he cut me off. If only I had my .357....