a. a. l. a l. a. ...
The abbreviation stands for "Alien astronaut looking a little annoyed" and is only the beginning of the full title, which at the same time is the description of what is shown in this image, and in its completeness is the following: Alien astronaut looking a little annoyed and wrollkling five of his external sensors, while sitting in the outlet of the last working proximity manoeuvering turbine of his spaceship (which unfortunately had an encounter at high speed with several pieces of space trash provided by mankind), heading downward and getting mentally prepared to turn into a meteorite before having had a chance to complete his honorable -but from a different point of view (i. e. that of his fellow citizens) traitorous- mission to tell mankind about their upcoming annihilation, that would only have been possible to avoid with the help of his knowledge.
Note: to wrollkle is to wrinkle and to roll at the same time; the expression is necessary due to the combined perceptiveness -and as a result of this, capability of movement- of these five external sensors of our unfortunate, but beloved "wasn't-meant-to-be-saviour".