When you are tired of hearing the same useless crap over and over from some one and you are basically telling them to F.O.

When you're being horny (especially around friends) and as a result shame ensues.

gesture for "sucka my balls" right hand open thumb spread to the left making a V in between the 4 fingers "2 on each side" and "for two times" use both hands with the same gesture

you cans shake the hand for effect