DANDRUFF DECODE

The meaning of this gesture seemed very plain to me. POTUS is saying.

I see that you have arrived at my house with the stench of dead Europe on you.

I can help take this dead flesh off your shoulders, but it will be done on my terms.

Decide.

>>1173564

May also be an oblique reference from POTUS' Scotch heritage. A dander is a casual stroll with no particular purpose. Signaling that Macron's visit is meaningless vis a vis the EU goal of the trip.