Look, I'm no expert when it comes to women and signals but if you have to spend more than a few seconds pondering the meaning of that action, I'm guessing you're not getting laid much.
o·vert
ōˈvərt,ˈōvərt/
adjective
done or shown openly; plainly or readily apparent, not secret or hidden.
"an overt act of aggression"
synonyms:
undisguised, unconcealed, plain (to see), clear, apparent, conspicuous, obvious, noticeable, manifest, patent, open, blatant
"an overt attempt to sidestep the truth"