It is a term of endearment as far as Drift's concerned.

"...all right." He collects himself for a minute, trying to remember some of the songs he knew. Most of them were Decepticon propaganda lyrics grafted over probably better melodies, so he picks one of those, hoping all the lyrics about injustice and retribution don't come of as too horrifying.

"It's probably better drunk," he murmurs as he finishes.