degrowth: decrecimiento

thanks to @dualectico on twitter for pointing me to this great explanation of it en un minutico

affirmative action: afirmación positiva (Col)

Acción afirmativa does get used in Colombia, but afirmación positiva is much more common.  It has much higher googlage along with the word Colombia - though I wonder if some of that is people talking about saying nice things to yourself (ie, positive affirmations), but it IS the term that government agencies use for what we would call affirmative action in the US. I think in other countries discriminación positiva might be the more commonly used term.  Thoughts?

trueque: barter

What goods and services do you/ could you barter in your community?

Que vivan las economias alternativas!

buycott: anti-boicoteo

This neologism seems to get used in two ways in English, but I think anti-boycott is probably the most common. 

The wikipedia entry USED to say: It has many names: “buycotting,” ethical consumerism, moral economics, latte activism, critical consumption. Whatever you call it, buying is getting ever more political across the affluent world. A car is no longer just a car, nor a cup of coffee just a cup of coffee. In the age of hybrids and fair trade, the mall is a forum to express convictions and hopes.

but NOW it says:

An anti-boycott or buycott is the excess buying of a particular brand or product in an attempt to counter a boycott of the same brand or product. It is also sometimes, incorrectly referred to as a "counter-boycott" (which, by the definition of "counter" would actually be the boycotting of another product/brand in response to a boycott).
The usual reason for an anti-boycott is to prevent a company or entity from backing down on the decision that initially caused the boycott.
Some examples of recent anti-boycotts include:

• The "Buy Danish" campaign, set up to counter the boycott of Danish goods by the Middle East
• The anti-boycotts by supporters of Israel^[1][2] to oppose Boycott Israel campaigns.^[3][4]
• When Whole Foods Market was boycotted because the CEO opposed U.S. President Barack Obama's health care reform policies, opponents of health care reform staged nationwide Buycotts.^[5]

And, of course, now there is a buycott app, which actually seems to use the first broader definition. If you were talking about the app you could also try my absolutely made up neologism of compracoteo, which has 0 googlage and is unlikely to be understood! :)