Creating specific taxonomy terms the Drush way is there a way to create specific taxonomy terms the drush way? 

the docs mention only a number argument to generate dummy terms.

http://www.drushcommands.com/drush-7x/devel-generate/generate-terms

i have around 150 terms (city - country (parent) - region (parent)) in one location taxonomy vocabulary. would be great if i can write the syntax in a text editor and use this to populate the vocabulary.

thx for any suggestions!
Try the taxonomy manager module. 

https://www.drupal.org/project/taxonomy_manager

It allows for mass insertion of terms.

There's also a taxonomy csv module which allows for import/export of taxonomies to file. That might be worth a try too:
https://www.drupal.org/project/taxonomy_csv

Else you can try and write your own module... But that's a rather tougher route.