Originates from sharing a small amount of weed where someone double-sucked the joint and left the others without the high they rightly deserved.
Paul: We would have if Eric just sucked as usual, but he double-sucked us all night.
2. when someone excessively sucks up
3. being a submissive bitch
2. oh look, there's susie doublesucking to her boss again
3. you're just gonna take that? stop doublesucking, bitch!